20828280

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{509}}^1$

素因数の和:565

約数の個数: 128

約数和(自身を含む): 70502400

約数和(自身を除く): 49674120

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 20, 22, 24, 30, 31, 33, 40, 44, 55, 60, 62, 66, 88, 93, 110, 120, 124, 132, 155, 165, 186, 220, 248, 264, 310, 330, 341, 372, 440, 465, 509, 620, 660, 682, 744, 930, 1018, 1023, 1240, 1320, 1364, 1527, 1705, 1860, 2036, 2046, 2545, 2728, 3054, 3410, 3720, 4072, 4092, 5090, 5115, 5599, 6108, 6820, 7635, 8184, 10180, 10230, 11198, 12216, 13640, 15270, 15779, 16797, 20360, 20460, 22396, 27995, 30540, 31558, 33594, 40920, 44792, 47337, 55990, 61080, 63116, 67188, 78895, 83985, 94674, 111980, 126232, 134376, 157790, 167970, 173569, 189348, 223960, 236685, 315580, 335940, 347138, 378696, 473370, 520707, 631160, 671880, 694276, 867845, 946740, 1041414, 1388552, 1735690, 1893480, 2082828, 2603535, 3471380, 4165656, 5207070, 6942760, 10414140, 20828280]

約数ペア:

[(1, 20828280), (2, 10414140), (3, 6942760), (4, 5207070), (5, 4165656), (6, 3471380), (8, 2603535), (10, 2082828), (11, 1893480), (12, 1735690), (15, 1388552), (20, 1041414), (22, 946740), (24, 867845), (30, 694276), (31, 671880), (33, 631160), (40, 520707), (44, 473370), (55, 378696), (60, 347138), (62, 335940), (66, 315580), (88, 236685), (93, 223960), (110, 189348), (120, 173569), (124, 167970), (132, 157790), (155, 134376), (165, 126232), (186, 111980), (220, 94674), (248, 83985), (264, 78895), (310, 67188), (330, 63116), (341, 61080), (372, 55990), (440, 47337), (465, 44792), (509, 40920), (620, 33594), (660, 31558), (682, 30540), (744, 27995), (930, 22396), (1018, 20460), (1023, 20360), (1240, 16797), (1320, 15779), (1364, 15270), (1527, 13640), (1705, 12216), (1860, 11198), (2036, 10230), (2046, 10180), (2545, 8184), (2728, 7635), (3054, 6820), (3410, 6108), (3720, 5599), (4072, 5115), (4092, 5090)]