21360680

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{1129}}^1$

素因数の和:1194

約数の個数: 64

約数和(自身を含む): 53697600

約数和(自身を除く): 32336920

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 43, 44, 55, 86, 88, 110, 172, 215, 220, 344, 430, 440, 473, 860, 946, 1129, 1720, 1892, 2258, 2365, 3784, 4516, 4730, 5645, 9032, 9460, 11290, 12419, 18920, 22580, 24838, 45160, 48547, 49676, 62095, 97094, 99352, 124190, 194188, 242735, 248380, 388376, 485470, 496760, 534017, 970940, 1068034, 1941880, 2136068, 2670085, 4272136, 5340170, 10680340, 21360680]

約数ペア:

[(1, 21360680), (2, 10680340), (4, 5340170), (5, 4272136), (8, 2670085), (10, 2136068), (11, 1941880), (20, 1068034), (22, 970940), (40, 534017), (43, 496760), (44, 485470), (55, 388376), (86, 248380), (88, 242735), (110, 194188), (172, 124190), (215, 99352), (220, 97094), (344, 62095), (430, 49676), (440, 48547), (473, 45160), (860, 24838), (946, 22580), (1129, 18920), (1720, 12419), (1892, 11290), (2258, 9460), (2365, 9032), (3784, 5645), (4516, 4730)]