21412820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{7487}}^1$

素因数の和:7520

約数の個数: 48

約数和(自身を含む): 52835328

約数和(自身を除く): 31422508

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 110, 130, 143, 220, 260, 286, 572, 715, 1430, 2860, 7487, 14974, 29948, 37435, 74870, 82357, 97331, 149740, 164714, 194662, 329428, 389324, 411785, 486655, 823570, 973310, 1070641, 1647140, 1946620, 2141282, 4282564, 5353205, 10706410, 21412820]

約数ペア:

[(1, 21412820), (2, 10706410), (4, 5353205), (5, 4282564), (10, 2141282), (11, 1946620), (13, 1647140), (20, 1070641), (22, 973310), (26, 823570), (44, 486655), (52, 411785), (55, 389324), (65, 329428), (110, 194662), (130, 164714), (143, 149740), (220, 97331), (260, 82357), (286, 74870), (572, 37435), (715, 29948), (1430, 14974), (2860, 7487)]