21485620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{4861}}^1$

素因数の和:4900

約数の個数: 48

約数和(自身を含む): 51459408

約数和(自身を除く): 29973788

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, 4861, 9722, 19444, 24305, 48610, 63193, 82637, 97220, 126386, 165274, 252772, 315965, 330548, 413185, 631930, 826370, 1074281, 1263860, 1652740, 2148562, 4297124, 5371405, 10742810, 21485620]

約数ペア:

[(1, 21485620), (2, 10742810), (4, 5371405), (5, 4297124), (10, 2148562), (13, 1652740), (17, 1263860), (20, 1074281), (26, 826370), (34, 631930), (52, 413185), (65, 330548), (68, 315965), (85, 252772), (130, 165274), (170, 126386), (221, 97220), (260, 82637), (340, 63193), (442, 48610), (884, 24305), (1105, 19444), (2210, 9722), (4420, 4861)]