20280420

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{307}}^1\times {\mathrm{367}}^1$

素因数の和:689

約数の個数: 72

約数和(自身を含む): 61885824

約数和(自身を除く): 41605404

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 307, 367, 614, 734, 921, 1101, 1228, 1468, 1535, 1835, 1842, 2202, 2763, 3070, 3303, 3670, 3684, 4404, 4605, 5505, 5526, 6140, 6606, 7340, 9210, 11010, 11052, 13212, 13815, 16515, 18420, 22020, 27630, 33030, 55260, 66060, 112669, 225338, 338007, 450676, 563345, 676014, 1014021, 1126690, 1352028, 1690035, 2028042, 2253380, 3380070, 4056084, 5070105, 6760140, 10140210, 20280420]

約数ペア:

[(1, 20280420), (2, 10140210), (3, 6760140), (4, 5070105), (5, 4056084), (6, 3380070), (9, 2253380), (10, 2028042), (12, 1690035), (15, 1352028), (18, 1126690), (20, 1014021), (30, 676014), (36, 563345), (45, 450676), (60, 338007), (90, 225338), (180, 112669), (307, 66060), (367, 55260), (614, 33030), (734, 27630), (921, 22020), (1101, 18420), (1228, 16515), (1468, 13815), (1535, 13212), (1835, 11052), (1842, 11010), (2202, 9210), (2763, 7340), (3070, 6606), (3303, 6140), (3670, 5526), (3684, 5505), (4404, 4605)]