20829640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{977}}^1$

素因数の和:1042

約数の個数: 64

約数和(自身を含む): 51755760

約数和(自身を除く): 30926120

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 41, 52, 65, 82, 104, 130, 164, 205, 260, 328, 410, 520, 533, 820, 977, 1066, 1640, 1954, 2132, 2665, 3908, 4264, 4885, 5330, 7816, 9770, 10660, 12701, 19540, 21320, 25402, 39080, 40057, 50804, 63505, 80114, 101608, 127010, 160228, 200285, 254020, 320456, 400570, 508040, 520741, 801140, 1041482, 1602280, 2082964, 2603705, 4165928, 5207410, 10414820, 20829640]

約数ペア:

[(1, 20829640), (2, 10414820), (4, 5207410), (5, 4165928), (8, 2603705), (10, 2082964), (13, 1602280), (20, 1041482), (26, 801140), (40, 520741), (41, 508040), (52, 400570), (65, 320456), (82, 254020), (104, 200285), (130, 160228), (164, 127010), (205, 101608), (260, 80114), (328, 63505), (410, 50804), (520, 40057), (533, 39080), (820, 25402), (977, 21320), (1066, 19540), (1640, 12701), (1954, 10660), (2132, 9770), (2665, 7816), (3908, 5330), (4264, 4885)]