21007120

素因数分解:

$2^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{151}}^1$

素因数の和:248

約数の個数: 80

約数和(自身を含む): 51568128

約数和(自身を除く): 30561008

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 37, 40, 47, 74, 80, 94, 148, 151, 185, 188, 235, 296, 302, 370, 376, 470, 592, 604, 740, 752, 755, 940, 1208, 1480, 1510, 1739, 1880, 2416, 2960, 3020, 3478, 3760, 5587, 6040, 6956, 7097, 8695, 11174, 12080, 13912, 14194, 17390, 22348, 27824, 27935, 28388, 34780, 35485, 44696, 55870, 56776, 69560, 70970, 89392, 111740, 113552, 139120, 141940, 223480, 262589, 283880, 446960, 525178, 567760, 1050356, 1312945, 2100712, 2625890, 4201424, 5251780, 10503560, 21007120]

約数ペア:

[(1, 21007120), (2, 10503560), (4, 5251780), (5, 4201424), (8, 2625890), (10, 2100712), (16, 1312945), (20, 1050356), (37, 567760), (40, 525178), (47, 446960), (74, 283880), (80, 262589), (94, 223480), (148, 141940), (151, 139120), (185, 113552), (188, 111740), (235, 89392), (296, 70970), (302, 69560), (370, 56776), (376, 55870), (470, 44696), (592, 35485), (604, 34780), (740, 28388), (752, 27935), (755, 27824), (940, 22348), (1208, 17390), (1480, 14194), (1510, 13912), (1739, 12080), (1880, 11174), (2416, 8695), (2960, 7097), (3020, 6956), (3478, 6040), (3760, 5587)]