21785830

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{109}}^1$

素因数の和:229

約数の個数: 64

約数和(自身を含む): 45619200

約数和(自身を除く): 23833370

約数列:

[1, 2, 5, 10, 11, 22, 23, 46, 55, 79, 109, 110, 115, 158, 218, 230, 253, 395, 506, 545, 790, 869, 1090, 1199, 1265, 1738, 1817, 2398, 2507, 2530, 3634, 4345, 5014, 5995, 8611, 8690, 9085, 11990, 12535, 17222, 18170, 19987, 25070, 27577, 39974, 43055, 55154, 86110, 94721, 99935, 137885, 189442, 198053, 199870, 275770, 396106, 473605, 947210, 990265, 1980530, 2178583, 4357166, 10892915, 21785830]

約数ペア:

[(1, 21785830), (2, 10892915), (5, 4357166), (10, 2178583), (11, 1980530), (22, 990265), (23, 947210), (46, 473605), (55, 396106), (79, 275770), (109, 199870), (110, 198053), (115, 189442), (158, 137885), (218, 99935), (230, 94721), (253, 86110), (395, 55154), (506, 43055), (545, 39974), (790, 27577), (869, 25070), (1090, 19987), (1199, 18170), (1265, 17222), (1738, 12535), (1817, 11990), (2398, 9085), (2507, 8690), (2530, 8611), (3634, 5995), (4345, 5014)]