81542620

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{1789}}^1$

素因数の和:1894

約数の個数: 48

約数和(自身を含む): 178627680

約数和(自身を除く): 97085060

約数列:

[1, 2, 4, 5, 10, 20, 43, 53, 86, 106, 172, 212, 215, 265, 430, 530, 860, 1060, 1789, 2279, 3578, 4558, 7156, 8945, 9116, 11395, 17890, 22790, 35780, 45580, 76927, 94817, 153854, 189634, 307708, 379268, 384635, 474085, 769270, 948170, 1538540, 1896340, 4077131, 8154262, 16308524, 20385655, 40771310, 81542620]

約数ペア:

[(1, 81542620), (2, 40771310), (4, 20385655), (5, 16308524), (10, 8154262), (20, 4077131), (43, 1896340), (53, 1538540), (86, 948170), (106, 769270), (172, 474085), (212, 384635), (215, 379268), (265, 307708), (430, 189634), (530, 153854), (860, 94817), (1060, 76927), (1789, 45580), (2279, 35780), (3578, 22790), (4558, 17890), (7156, 11395), (8945, 9116)]