21754684

素因数分解:

$2^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{353}}^1$

素因数の和:466

約数の個数: 48

約数和(自身を含む): 45674496

約数和(自身を除く): 23919812

約数列:

[1, 2, 4, 7, 14, 28, 31, 62, 71, 124, 142, 217, 284, 353, 434, 497, 706, 868, 994, 1412, 1988, 2201, 2471, 4402, 4942, 8804, 9884, 10943, 15407, 21886, 25063, 30814, 43772, 50126, 61628, 76601, 100252, 153202, 175441, 306404, 350882, 701764, 776953, 1553906, 3107812, 5438671, 10877342, 21754684]

約数ペア:

[(1, 21754684), (2, 10877342), (4, 5438671), (7, 3107812), (14, 1553906), (28, 776953), (31, 701764), (62, 350882), (71, 306404), (124, 175441), (142, 153202), (217, 100252), (284, 76601), (353, 61628), (434, 50126), (497, 43772), (706, 30814), (868, 25063), (994, 21886), (1412, 15407), (1988, 10943), (2201, 9884), (2471, 8804), (4402, 4942)]