20495540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{4637}}^1$

素因数の和:4676

約数の個数: 48

約数和(自身を含む): 49088592

約数和(自身を除く): 28593052

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 260, 340, 442, 884, 1105, 2210, 4420, 4637, 9274, 18548, 23185, 46370, 60281, 78829, 92740, 120562, 157658, 241124, 301405, 315316, 394145, 602810, 788290, 1024777, 1205620, 1576580, 2049554, 4099108, 5123885, 10247770, 20495540]

約数ペア:

[(1, 20495540), (2, 10247770), (4, 5123885), (5, 4099108), (10, 2049554), (13, 1576580), (17, 1205620), (20, 1024777), (26, 788290), (34, 602810), (52, 394145), (65, 315316), (68, 301405), (85, 241124), (130, 157658), (170, 120562), (221, 92740), (260, 78829), (340, 60281), (442, 46370), (884, 23185), (1105, 18548), (2210, 9274), (4420, 4637)]