20187640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{97}}^1$

素因数の和:173

約数の個数: 96

約数和(自身を含む): 51614640

約数和(自身を除く): 31427000

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 43, 44, 55, 86, 88, 97, 110, 121, 172, 194, 215, 220, 242, 344, 388, 430, 440, 473, 484, 485, 605, 776, 860, 946, 968, 970, 1067, 1210, 1720, 1892, 1940, 2134, 2365, 2420, 3784, 3880, 4171, 4268, 4730, 4840, 5203, 5335, 8342, 8536, 9460, 10406, 10670, 11737, 16684, 18920, 20812, 20855, 21340, 23474, 26015, 33368, 41624, 41710, 42680, 45881, 46948, 52030, 58685, 83420, 91762, 93896, 104060, 117370, 166840, 183524, 208120, 229405, 234740, 367048, 458810, 469480, 504691, 917620, 1009382, 1835240, 2018764, 2523455, 4037528, 5046910, 10093820, 20187640]

約数ペア:

[(1, 20187640), (2, 10093820), (4, 5046910), (5, 4037528), (8, 2523455), (10, 2018764), (11, 1835240), (20, 1009382), (22, 917620), (40, 504691), (43, 469480), (44, 458810), (55, 367048), (86, 234740), (88, 229405), (97, 208120), (110, 183524), (121, 166840), (172, 117370), (194, 104060), (215, 93896), (220, 91762), (242, 83420), (344, 58685), (388, 52030), (430, 46948), (440, 45881), (473, 42680), (484, 41710), (485, 41624), (605, 33368), (776, 26015), (860, 23474), (946, 21340), (968, 20855), (970, 20812), (1067, 18920), (1210, 16684), (1720, 11737), (1892, 10670), (1940, 10406), (2134, 9460), (2365, 8536), (2420, 8342), (3784, 5335), (3880, 5203), (4171, 4840), (4268, 4730)]