20902520

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{521}}^1$

素因数の和:608

約数の個数: 64

約数和(自身を含む): 50738400

約数和(自身を除く): 29835880

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 59, 68, 85, 118, 136, 170, 236, 295, 340, 472, 521, 590, 680, 1003, 1042, 1180, 2006, 2084, 2360, 2605, 4012, 4168, 5015, 5210, 8024, 8857, 10030, 10420, 17714, 20060, 20840, 30739, 35428, 40120, 44285, 61478, 70856, 88570, 122956, 153695, 177140, 245912, 307390, 354280, 522563, 614780, 1045126, 1229560, 2090252, 2612815, 4180504, 5225630, 10451260, 20902520]

約数ペア:

[(1, 20902520), (2, 10451260), (4, 5225630), (5, 4180504), (8, 2612815), (10, 2090252), (17, 1229560), (20, 1045126), (34, 614780), (40, 522563), (59, 354280), (68, 307390), (85, 245912), (118, 177140), (136, 153695), (170, 122956), (236, 88570), (295, 70856), (340, 61478), (472, 44285), (521, 40120), (590, 35428), (680, 30739), (1003, 20840), (1042, 20060), (1180, 17714), (2006, 10420), (2084, 10030), (2360, 8857), (2605, 8024), (4012, 5210), (4168, 5015)]