21250040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{2617}}^1$

素因数の和:2664

約数の個数: 64

約数和(自身を含む): 56548800

約数和(自身を除く): 35298760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 29, 35, 40, 56, 58, 70, 116, 140, 145, 203, 232, 280, 290, 406, 580, 812, 1015, 1160, 1624, 2030, 2617, 4060, 5234, 8120, 10468, 13085, 18319, 20936, 26170, 36638, 52340, 73276, 75893, 91595, 104680, 146552, 151786, 183190, 303572, 366380, 379465, 531251, 607144, 732760, 758930, 1062502, 1517860, 2125004, 2656255, 3035720, 4250008, 5312510, 10625020, 21250040]

約数ペア:

[(1, 21250040), (2, 10625020), (4, 5312510), (5, 4250008), (7, 3035720), (8, 2656255), (10, 2125004), (14, 1517860), (20, 1062502), (28, 758930), (29, 732760), (35, 607144), (40, 531251), (56, 379465), (58, 366380), (70, 303572), (116, 183190), (140, 151786), (145, 146552), (203, 104680), (232, 91595), (280, 75893), (290, 73276), (406, 52340), (580, 36638), (812, 26170), (1015, 20936), (1160, 18319), (1624, 13085), (2030, 10468), (2617, 8120), (4060, 5234)]