1689878780

素因数分解:

$2^2\times 5^1\times {\mathrm{6421}}^1\times {\mathrm{13159}}^1$

素因数の和:19589

約数の個数: 24

約数和(自身を含む): 3549567840

約数和(自身を除く): 1859689060

約数列:

[1, 2, 4, 5, 10, 20, 6421, 12842, 13159, 25684, 26318, 32105, 52636, 64210, 65795, 128420, 131590, 263180, 84493939, 168987878, 337975756, 422469695, 844939390, 1689878780]

約数ペア:

[(1, 1689878780), (2, 844939390), (4, 422469695), (5, 337975756), (10, 168987878), (20, 84493939), (6421, 263180), (12842, 131590), (13159, 128420), (25684, 65795), (26318, 64210), (32105, 52636)]