18989660

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{311}}^1$

素因数の和:434

約数の個数: 48

約数和(自身を含む): 41513472

約数和(自身を除く): 22523812

約数列:

[1, 2, 4, 5, 10, 20, 43, 71, 86, 142, 172, 215, 284, 311, 355, 430, 622, 710, 860, 1244, 1420, 1555, 3053, 3110, 6106, 6220, 12212, 13373, 15265, 22081, 26746, 30530, 44162, 53492, 61060, 66865, 88324, 110405, 133730, 220810, 267460, 441620, 949483, 1898966, 3797932, 4747415, 9494830, 18989660]

約数ペア:

[(1, 18989660), (2, 9494830), (4, 4747415), (5, 3797932), (10, 1898966), (20, 949483), (43, 441620), (71, 267460), (86, 220810), (142, 133730), (172, 110405), (215, 88324), (284, 66865), (311, 61060), (355, 53492), (430, 44162), (622, 30530), (710, 26746), (860, 22081), (1244, 15265), (1420, 13373), (1555, 12212), (3053, 6220), (3110, 6106)]