21799240

素因数分解:

$2^3\times 5^1\times {\mathrm{271}}^1\times {\mathrm{2011}}^1$

素因数の和:2293

約数の個数: 32

約数和(自身を含む): 49253760

約数和(自身を除く): 27454520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 271, 542, 1084, 1355, 2011, 2168, 2710, 4022, 5420, 8044, 10055, 10840, 16088, 20110, 40220, 80440, 544981, 1089962, 2179924, 2724905, 4359848, 5449810, 10899620, 21799240]

約数ペア:

[(1, 21799240), (2, 10899620), (4, 5449810), (5, 4359848), (8, 2724905), (10, 2179924), (20, 1089962), (40, 544981), (271, 80440), (542, 40220), (1084, 20110), (1355, 16088), (2011, 10840), (2168, 10055), (2710, 8044), (4022, 5420)]