638973765

素因数分解:

$3^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{36691}}^1$

素因数の和:36751

約数の個数: 40

約数和(自身を含む): 1172089248

約数和(自身を除く): 533115483

約数列:

[1, 3, 5, 9, 15, 27, 43, 45, 81, 129, 135, 215, 387, 405, 645, 1161, 1935, 3483, 5805, 17415, 36691, 110073, 183455, 330219, 550365, 990657, 1577713, 1651095, 2971971, 4733139, 4953285, 7888565, 14199417, 14859855, 23665695, 42598251, 70997085, 127794753, 212991255, 638973765]

約数ペア:

[(1, 638973765), (3, 212991255), (5, 127794753), (9, 70997085), (15, 42598251), (27, 23665695), (43, 14859855), (45, 14199417), (81, 7888565), (129, 4953285), (135, 4733139), (215, 2971971), (387, 1651095), (405, 1577713), (645, 990657), (1161, 550365), (1935, 330219), (3483, 183455), (5805, 110073), (17415, 36691)]