21209580

素因数分解:

$2^2\times 3^3\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{181}}^1$

素因数の和:237

約数の個数: 192

約数和(自身を含む): 78274560

約数和(自身を除く): 57064980

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 27, 28, 30, 31, 35, 36, 42, 45, 54, 60, 62, 63, 70, 84, 90, 93, 105, 108, 124, 126, 135, 140, 155, 180, 181, 186, 189, 210, 217, 252, 270, 279, 310, 315, 362, 372, 378, 420, 434, 465, 540, 543, 558, 620, 630, 651, 724, 756, 837, 868, 905, 930, 945, 1085, 1086, 1116, 1260, 1267, 1302, 1395, 1629, 1674, 1810, 1860, 1890, 1953, 2170, 2172, 2534, 2604, 2715, 2790, 3255, 3258, 3348, 3620, 3780, 3801, 3906, 4185, 4340, 4887, 5068, 5430, 5580, 5611, 5859, 6335, 6510, 6516, 7602, 7812, 8145, 8370, 9765, 9774, 10860, 11222, 11403, 11718, 12670, 13020, 15204, 16290, 16740, 16833, 19005, 19530, 19548, 22444, 22806, 23436, 24435, 25340, 28055, 29295, 32580, 33666, 34209, 38010, 39060, 39277, 45612, 48870, 50499, 56110, 57015, 58590, 67332, 68418, 76020, 78554, 84165, 97740, 100998, 112220, 114030, 117180, 117831, 136836, 151497, 157108, 168330, 171045, 196385, 201996, 228060, 235662, 252495, 302994, 336660, 342090, 353493, 392770, 471324, 504990, 589155, 605988, 684180, 706986, 757485, 785540, 1009980, 1060479, 1178310, 1413972, 1514970, 1767465, 2120958, 2356620, 3029940, 3534930, 4241916, 5302395, 7069860, 10604790, 21209580]

約数ペア:

[(1, 21209580), (2, 10604790), (3, 7069860), (4, 5302395), (5, 4241916), (6, 3534930), (7, 3029940), (9, 2356620), (10, 2120958), (12, 1767465), (14, 1514970), (15, 1413972), (18, 1178310), (20, 1060479), (21, 1009980), (27, 785540), (28, 757485), (30, 706986), (31, 684180), (35, 605988), (36, 589155), (42, 504990), (45, 471324), (54, 392770), (60, 353493), (62, 342090), (63, 336660), (70, 302994), (84, 252495), (90, 235662), (93, 228060), (105, 201996), (108, 196385), (124, 171045), (126, 168330), (135, 157108), (140, 151497), (155, 136836), (180, 117831), (181, 117180), (186, 114030), (189, 112220), (210, 100998), (217, 97740), (252, 84165), (270, 78554), (279, 76020), (310, 68418), (315, 67332), (362, 58590), (372, 57015), (378, 56110), (420, 50499), (434, 48870), (465, 45612), (540, 39277), (543, 39060), (558, 38010), (620, 34209), (630, 33666), (651, 32580), (724, 29295), (756, 28055), (837, 25340), (868, 24435), (905, 23436), (930, 22806), (945, 22444), (1085, 19548), (1086, 19530), (1116, 19005), (1260, 16833), (1267, 16740), (1302, 16290), (1395, 15204), (1629, 13020), (1674, 12670), (1810, 11718), (1860, 11403), (1890, 11222), (1953, 10860), (2170, 9774), (2172, 9765), (2534, 8370), (2604, 8145), (2715, 7812), (2790, 7602), (3255, 6516), (3258, 6510), (3348, 6335), (3620, 5859), (3780, 5611), (3801, 5580), (3906, 5430), (4185, 5068), (4340, 4887)]