72222620

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{181}}^1\times {\mathrm{281}}^1$

素因数の和:542

約数の個数: 48

約数和(自身を含む): 155203776

約数和(自身を除く): 82981156

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 181, 281, 284, 355, 362, 562, 710, 724, 905, 1124, 1405, 1420, 1810, 2810, 3620, 5620, 12851, 19951, 25702, 39902, 50861, 51404, 64255, 79804, 99755, 101722, 128510, 199510, 203444, 254305, 257020, 399020, 508610, 1017220, 3611131, 7222262, 14444524, 18055655, 36111310, 72222620]

約数ペア:

[(1, 72222620), (2, 36111310), (4, 18055655), (5, 14444524), (10, 7222262), (20, 3611131), (71, 1017220), (142, 508610), (181, 399020), (281, 257020), (284, 254305), (355, 203444), (362, 199510), (562, 128510), (710, 101722), (724, 99755), (905, 79804), (1124, 64255), (1405, 51404), (1420, 50861), (1810, 39902), (2810, 25702), (3620, 19951), (5620, 12851)]