72123220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{3907}}^1$

素因数の和:4000

約数の個数: 48

約数和(自身を含む): 165449088

約数和(自身を除く): 93325868

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 71, 130, 142, 260, 284, 355, 710, 923, 1420, 1846, 3692, 3907, 4615, 7814, 9230, 15628, 18460, 19535, 39070, 50791, 78140, 101582, 203164, 253955, 277397, 507910, 554794, 1015820, 1109588, 1386985, 2773970, 3606161, 5547940, 7212322, 14424644, 18030805, 36061610, 72123220]

約数ペア:

[(1, 72123220), (2, 36061610), (4, 18030805), (5, 14424644), (10, 7212322), (13, 5547940), (20, 3606161), (26, 2773970), (52, 1386985), (65, 1109588), (71, 1015820), (130, 554794), (142, 507910), (260, 277397), (284, 253955), (355, 203164), (710, 101582), (923, 78140), (1420, 50791), (1846, 39070), (3692, 19535), (3907, 18460), (4615, 15628), (7814, 9230)]