20660080

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{467}}^1$

素因数の和:566

約数の個数: 80

約数和(自身を含む): 55710720

約数和(自身を除く): 35050640

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 79, 80, 112, 140, 158, 280, 316, 395, 467, 553, 560, 632, 790, 934, 1106, 1264, 1580, 1868, 2212, 2335, 2765, 3160, 3269, 3736, 4424, 4670, 5530, 6320, 6538, 7472, 8848, 9340, 11060, 13076, 16345, 18680, 22120, 26152, 32690, 36893, 37360, 44240, 52304, 65380, 73786, 130760, 147572, 184465, 258251, 261520, 295144, 368930, 516502, 590288, 737860, 1033004, 1291255, 1475720, 2066008, 2582510, 2951440, 4132016, 5165020, 10330040, 20660080]

約数ペア:

[(1, 20660080), (2, 10330040), (4, 5165020), (5, 4132016), (7, 2951440), (8, 2582510), (10, 2066008), (14, 1475720), (16, 1291255), (20, 1033004), (28, 737860), (35, 590288), (40, 516502), (56, 368930), (70, 295144), (79, 261520), (80, 258251), (112, 184465), (140, 147572), (158, 130760), (280, 73786), (316, 65380), (395, 52304), (467, 44240), (553, 37360), (560, 36893), (632, 32690), (790, 26152), (934, 22120), (1106, 18680), (1264, 16345), (1580, 13076), (1868, 11060), (2212, 9340), (2335, 8848), (2765, 7472), (3160, 6538), (3269, 6320), (3736, 5530), (4424, 4670)]