21172340

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{3517}}^1$

素因数の和:3576

約数の個数: 48

約数和(自身を含む): 52010112

約数和(自身を除く): 30837772

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 43, 70, 86, 140, 172, 215, 301, 430, 602, 860, 1204, 1505, 3010, 3517, 6020, 7034, 14068, 17585, 24619, 35170, 49238, 70340, 98476, 123095, 151231, 246190, 302462, 492380, 604924, 756155, 1058617, 1512310, 2117234, 3024620, 4234468, 5293085, 10586170, 21172340]

約数ペア:

[(1, 21172340), (2, 10586170), (4, 5293085), (5, 4234468), (7, 3024620), (10, 2117234), (14, 1512310), (20, 1058617), (28, 756155), (35, 604924), (43, 492380), (70, 302462), (86, 246190), (140, 151231), (172, 123095), (215, 98476), (301, 70340), (430, 49238), (602, 35170), (860, 24619), (1204, 17585), (1505, 14068), (3010, 7034), (3517, 6020)]