21048040

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2381}}^1$

素因数の和:2422

約数の個数: 64

約数和(自身を含む): 54023760

約数和(自身を除く): 32975720

約数列:

[1, 2, 4, 5, 8, 10, 13, 17, 20, 26, 34, 40, 52, 65, 68, 85, 104, 130, 136, 170, 221, 260, 340, 442, 520, 680, 884, 1105, 1768, 2210, 2381, 4420, 4762, 8840, 9524, 11905, 19048, 23810, 30953, 40477, 47620, 61906, 80954, 95240, 123812, 154765, 161908, 202385, 247624, 309530, 323816, 404770, 526201, 619060, 809540, 1052402, 1238120, 1619080, 2104804, 2631005, 4209608, 5262010, 10524020, 21048040]

約数ペア:

[(1, 21048040), (2, 10524020), (4, 5262010), (5, 4209608), (8, 2631005), (10, 2104804), (13, 1619080), (17, 1238120), (20, 1052402), (26, 809540), (34, 619060), (40, 526201), (52, 404770), (65, 323816), (68, 309530), (85, 247624), (104, 202385), (130, 161908), (136, 154765), (170, 123812), (221, 95240), (260, 80954), (340, 61906), (442, 47620), (520, 40477), (680, 30953), (884, 23810), (1105, 19048), (1768, 11905), (2210, 9524), (2381, 8840), (4420, 4762)]