20505320

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{1607}}^1$

素因数の和:1658

約数の個数: 64

約数和(自身を含む): 52099200

約数和(自身を除く): 31593880

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 29, 40, 44, 55, 58, 88, 110, 116, 145, 220, 232, 290, 319, 440, 580, 638, 1160, 1276, 1595, 1607, 2552, 3190, 3214, 6380, 6428, 8035, 12760, 12856, 16070, 17677, 32140, 35354, 46603, 64280, 70708, 88385, 93206, 141416, 176770, 186412, 233015, 353540, 372824, 466030, 512633, 707080, 932060, 1025266, 1864120, 2050532, 2563165, 4101064, 5126330, 10252660, 20505320]

約数ペア:

[(1, 20505320), (2, 10252660), (4, 5126330), (5, 4101064), (8, 2563165), (10, 2050532), (11, 1864120), (20, 1025266), (22, 932060), (29, 707080), (40, 512633), (44, 466030), (55, 372824), (58, 353540), (88, 233015), (110, 186412), (116, 176770), (145, 141416), (220, 93206), (232, 88385), (290, 70708), (319, 64280), (440, 46603), (580, 35354), (638, 32140), (1160, 17677), (1276, 16070), (1595, 12856), (1607, 12760), (2552, 8035), (3190, 6428), (3214, 6380)]