21324760

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{73}}^1\times {\mathrm{109}}^1$

素因数の和:260

約数の個数: 64

約数和(自身を含む): 49816800

約数和(自身を除く): 28492040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 73, 109, 134, 146, 218, 268, 292, 335, 365, 436, 536, 545, 584, 670, 730, 872, 1090, 1340, 1460, 2180, 2680, 2920, 4360, 4891, 7303, 7957, 9782, 14606, 15914, 19564, 24455, 29212, 31828, 36515, 39128, 39785, 48910, 58424, 63656, 73030, 79570, 97820, 146060, 159140, 195640, 292120, 318280, 533119, 1066238, 2132476, 2665595, 4264952, 5331190, 10662380, 21324760]

約数ペア:

[(1, 21324760), (2, 10662380), (4, 5331190), (5, 4264952), (8, 2665595), (10, 2132476), (20, 1066238), (40, 533119), (67, 318280), (73, 292120), (109, 195640), (134, 159140), (146, 146060), (218, 97820), (268, 79570), (292, 73030), (335, 63656), (365, 58424), (436, 48910), (536, 39785), (545, 39128), (584, 36515), (670, 31828), (730, 29212), (872, 24455), (1090, 19564), (1340, 15914), (1460, 14606), (2180, 9782), (2680, 7957), (2920, 7303), (4360, 4891)]