21058180

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{199}}^1$

素因数の和:269

約数の個数: 96

約数和(自身を含む): 53625600

約数和(自身を除く): 32567420

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 37, 44, 52, 55, 65, 74, 110, 130, 143, 148, 185, 199, 220, 260, 286, 370, 398, 407, 481, 572, 715, 740, 796, 814, 962, 995, 1430, 1628, 1924, 1990, 2035, 2189, 2405, 2587, 2860, 3980, 4070, 4378, 4810, 5174, 5291, 7363, 8140, 8756, 9620, 10348, 10582, 10945, 12935, 14726, 21164, 21890, 25870, 26455, 28457, 29452, 36815, 43780, 51740, 52910, 56914, 73630, 80993, 95719, 105820, 113828, 142285, 147260, 161986, 191438, 284570, 323972, 382876, 404965, 478595, 569140, 809930, 957190, 1052909, 1619860, 1914380, 2105818, 4211636, 5264545, 10529090, 21058180]

約数ペア:

[(1, 21058180), (2, 10529090), (4, 5264545), (5, 4211636), (10, 2105818), (11, 1914380), (13, 1619860), (20, 1052909), (22, 957190), (26, 809930), (37, 569140), (44, 478595), (52, 404965), (55, 382876), (65, 323972), (74, 284570), (110, 191438), (130, 161986), (143, 147260), (148, 142285), (185, 113828), (199, 105820), (220, 95719), (260, 80993), (286, 73630), (370, 56914), (398, 52910), (407, 51740), (481, 43780), (572, 36815), (715, 29452), (740, 28457), (796, 26455), (814, 25870), (962, 21890), (995, 21164), (1430, 14726), (1628, 12935), (1924, 10945), (1990, 10582), (2035, 10348), (2189, 9620), (2405, 8756), (2587, 8140), (2860, 7363), (3980, 5291), (4070, 5174), (4378, 4810)]