21512810

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{223}}^1\times {\mathrm{877}}^1$

素因数の和:1118

約数の個数: 32

約数和(自身を含む): 42481152

約数和(自身を除く): 20968342

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 223, 446, 877, 1115, 1754, 2230, 2453, 4385, 4906, 8770, 9647, 12265, 19294, 24530, 48235, 96470, 195571, 391142, 977855, 1955710, 2151281, 4302562, 10756405, 21512810]

約数ペア:

[(1, 21512810), (2, 10756405), (5, 4302562), (10, 2151281), (11, 1955710), (22, 977855), (55, 391142), (110, 195571), (223, 96470), (446, 48235), (877, 24530), (1115, 19294), (1754, 12265), (2230, 9647), (2453, 8770), (4385, 4906)]