20391460

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1\times {\mathrm{181}}^1$

素因数の和:364

約数の個数: 48

約数和(自身を含む): 44396352

約数和(自身を除く): 24004892

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 131, 172, 181, 215, 262, 362, 430, 524, 655, 724, 860, 905, 1310, 1810, 2620, 3620, 5633, 7783, 11266, 15566, 22532, 23711, 28165, 31132, 38915, 47422, 56330, 77830, 94844, 112660, 118555, 155660, 237110, 474220, 1019573, 2039146, 4078292, 5097865, 10195730, 20391460]

約数ペア:

[(1, 20391460), (2, 10195730), (4, 5097865), (5, 4078292), (10, 2039146), (20, 1019573), (43, 474220), (86, 237110), (131, 155660), (172, 118555), (181, 112660), (215, 94844), (262, 77830), (362, 56330), (430, 47422), (524, 38915), (655, 31132), (724, 28165), (860, 23711), (905, 22532), (1310, 15566), (1810, 11266), (2620, 7783), (3620, 5633)]