20754760

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{167}}^1\times {\mathrm{239}}^1$

素因数の和:430

約数の個数: 64

約数和(自身を含む): 50803200

約数和(自身を除く): 30048440

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 167, 239, 260, 334, 478, 520, 668, 835, 956, 1195, 1336, 1670, 1912, 2171, 2390, 3107, 3340, 4342, 4780, 6214, 6680, 8684, 9560, 10855, 12428, 15535, 17368, 21710, 24856, 31070, 39913, 43420, 62140, 79826, 86840, 124280, 159652, 199565, 319304, 399130, 518869, 798260, 1037738, 1596520, 2075476, 2594345, 4150952, 5188690, 10377380, 20754760]

約数ペア:

[(1, 20754760), (2, 10377380), (4, 5188690), (5, 4150952), (8, 2594345), (10, 2075476), (13, 1596520), (20, 1037738), (26, 798260), (40, 518869), (52, 399130), (65, 319304), (104, 199565), (130, 159652), (167, 124280), (239, 86840), (260, 79826), (334, 62140), (478, 43420), (520, 39913), (668, 31070), (835, 24856), (956, 21710), (1195, 17368), (1336, 15535), (1670, 12428), (1912, 10855), (2171, 9560), (2390, 8684), (3107, 6680), (3340, 6214), (4342, 4780)]