20008980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{1249}}^1$

素因数の和:1353

約数の個数: 72

約数和(自身を含む): 61425000

約数和(自身を除く): 41416020

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 89, 90, 178, 180, 267, 356, 445, 534, 801, 890, 1068, 1249, 1335, 1602, 1780, 2498, 2670, 3204, 3747, 4005, 4996, 5340, 6245, 7494, 8010, 11241, 12490, 14988, 16020, 18735, 22482, 24980, 37470, 44964, 56205, 74940, 111161, 112410, 222322, 224820, 333483, 444644, 555805, 666966, 1000449, 1111610, 1333932, 1667415, 2000898, 2223220, 3334830, 4001796, 5002245, 6669660, 10004490, 20008980]

約数ペア:

[(1, 20008980), (2, 10004490), (3, 6669660), (4, 5002245), (5, 4001796), (6, 3334830), (9, 2223220), (10, 2000898), (12, 1667415), (15, 1333932), (18, 1111610), (20, 1000449), (30, 666966), (36, 555805), (45, 444644), (60, 333483), (89, 224820), (90, 222322), (178, 112410), (180, 111161), (267, 74940), (356, 56205), (445, 44964), (534, 37470), (801, 24980), (890, 22482), (1068, 18735), (1249, 16020), (1335, 14988), (1602, 12490), (1780, 11241), (2498, 8010), (2670, 7494), (3204, 6245), (3747, 5340), (4005, 4996)]