28909980

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{157}}^1$

素因数の和:217

約数の個数: 192

約数和(自身を含む): 101928960

約数和(自身を除く): 73018980

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 27, 30, 31, 33, 36, 44, 45, 54, 55, 60, 62, 66, 90, 93, 99, 108, 110, 124, 132, 135, 155, 157, 165, 180, 186, 198, 220, 270, 279, 297, 310, 314, 330, 341, 372, 396, 465, 471, 495, 540, 558, 594, 620, 628, 660, 682, 785, 837, 930, 942, 990, 1023, 1116, 1188, 1364, 1395, 1413, 1485, 1570, 1674, 1705, 1727, 1860, 1884, 1980, 2046, 2355, 2790, 2826, 2970, 3069, 3140, 3348, 3410, 3454, 4092, 4185, 4239, 4710, 4867, 5115, 5181, 5580, 5652, 5940, 6138, 6820, 6908, 7065, 8370, 8478, 8635, 9207, 9420, 9734, 10230, 10362, 12276, 14130, 14601, 15345, 15543, 16740, 16956, 17270, 18414, 19468, 20460, 20724, 21195, 24335, 25905, 28260, 29202, 30690, 31086, 34540, 36828, 42390, 43803, 46035, 46629, 48670, 51810, 53537, 58404, 61380, 62172, 73005, 77715, 84780, 87606, 92070, 93258, 97340, 103620, 107074, 131409, 146010, 155430, 160611, 175212, 184140, 186516, 214148, 219015, 233145, 262818, 267685, 292020, 310860, 321222, 438030, 466290, 481833, 525636, 535370, 642444, 657045, 803055, 876060, 932580, 963666, 1070740, 1314090, 1445499, 1606110, 1927332, 2409165, 2628180, 2890998, 3212220, 4818330, 5781996, 7227495, 9636660, 14454990, 28909980]

約数ペア:

[(1, 28909980), (2, 14454990), (3, 9636660), (4, 7227495), (5, 5781996), (6, 4818330), (9, 3212220), (10, 2890998), (11, 2628180), (12, 2409165), (15, 1927332), (18, 1606110), (20, 1445499), (22, 1314090), (27, 1070740), (30, 963666), (31, 932580), (33, 876060), (36, 803055), (44, 657045), (45, 642444), (54, 535370), (55, 525636), (60, 481833), (62, 466290), (66, 438030), (90, 321222), (93, 310860), (99, 292020), (108, 267685), (110, 262818), (124, 233145), (132, 219015), (135, 214148), (155, 186516), (157, 184140), (165, 175212), (180, 160611), (186, 155430), (198, 146010), (220, 131409), (270, 107074), (279, 103620), (297, 97340), (310, 93258), (314, 92070), (330, 87606), (341, 84780), (372, 77715), (396, 73005), (465, 62172), (471, 61380), (495, 58404), (540, 53537), (558, 51810), (594, 48670), (620, 46629), (628, 46035), (660, 43803), (682, 42390), (785, 36828), (837, 34540), (930, 31086), (942, 30690), (990, 29202), (1023, 28260), (1116, 25905), (1188, 24335), (1364, 21195), (1395, 20724), (1413, 20460), (1485, 19468), (1570, 18414), (1674, 17270), (1705, 16956), (1727, 16740), (1860, 15543), (1884, 15345), (1980, 14601), (2046, 14130), (2355, 12276), (2790, 10362), (2826, 10230), (2970, 9734), (3069, 9420), (3140, 9207), (3348, 8635), (3410, 8478), (3454, 8370), (4092, 7065), (4185, 6908), (4239, 6820), (4710, 6138), (4867, 5940), (5115, 5652), (5181, 5580)]