20996821820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{2551}}^1\times {\mathrm{31657}}^1$

素因数の和:34230

約数の個数: 48

約数和(自身を含む): 47505235008

約数和(自身を除く): 26508413188

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 2551, 5102, 10204, 12755, 25510, 31657, 33163, 51020, 63314, 66326, 126628, 132652, 158285, 165815, 316570, 331630, 411541, 633140, 663260, 823082, 1646164, 2057705, 4115410, 8230820, 80757007, 161514014, 323028028, 403785035, 807570070, 1049841091, 1615140140, 2099682182, 4199364364, 5249205455, 10498410910, 20996821820]

約数ペア:

[(1, 20996821820), (2, 10498410910), (4, 5249205455), (5, 4199364364), (10, 2099682182), (13, 1615140140), (20, 1049841091), (26, 807570070), (52, 403785035), (65, 323028028), (130, 161514014), (260, 80757007), (2551, 8230820), (5102, 4115410), (10204, 2057705), (12755, 1646164), (25510, 823082), (31657, 663260), (33163, 633140), (51020, 411541), (63314, 331630), (66326, 316570), (126628, 165815), (132652, 158285)]