18852920

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{113}}^1$

素因数の和:264

約数の個数: 64

約数和(自身を含む): 44241120

約数和(自身を除く): 25388200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 97, 113, 172, 194, 215, 226, 344, 388, 430, 452, 485, 565, 776, 860, 904, 970, 1130, 1720, 1940, 2260, 3880, 4171, 4520, 4859, 8342, 9718, 10961, 16684, 19436, 20855, 21922, 24295, 33368, 38872, 41710, 43844, 48590, 54805, 83420, 87688, 97180, 109610, 166840, 194360, 219220, 438440, 471323, 942646, 1885292, 2356615, 3770584, 4713230, 9426460, 18852920]

約数ペア:

[(1, 18852920), (2, 9426460), (4, 4713230), (5, 3770584), (8, 2356615), (10, 1885292), (20, 942646), (40, 471323), (43, 438440), (86, 219220), (97, 194360), (113, 166840), (172, 109610), (194, 97180), (215, 87688), (226, 83420), (344, 54805), (388, 48590), (430, 43844), (452, 41710), (485, 38872), (565, 33368), (776, 24295), (860, 21922), (904, 20855), (970, 19436), (1130, 16684), (1720, 10961), (1940, 9718), (2260, 8342), (3880, 4859), (4171, 4520)]