19843640

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{83}}^1\times {\mathrm{139}}^1$

素因数の和:276

約数の個数: 64

約数和(自身を含む): 46569600

約数和(自身を除く): 26725960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 83, 86, 139, 166, 172, 215, 278, 332, 344, 415, 430, 556, 664, 695, 830, 860, 1112, 1390, 1660, 1720, 2780, 3320, 3569, 5560, 5977, 7138, 11537, 11954, 14276, 17845, 23074, 23908, 28552, 29885, 35690, 46148, 47816, 57685, 59770, 71380, 92296, 115370, 119540, 142760, 230740, 239080, 461480, 496091, 992182, 1984364, 2480455, 3968728, 4960910, 9921820, 19843640]

約数ペア:

[(1, 19843640), (2, 9921820), (4, 4960910), (5, 3968728), (8, 2480455), (10, 1984364), (20, 992182), (40, 496091), (43, 461480), (83, 239080), (86, 230740), (139, 142760), (166, 119540), (172, 115370), (215, 92296), (278, 71380), (332, 59770), (344, 57685), (415, 47816), (430, 46148), (556, 35690), (664, 29885), (695, 28552), (830, 23908), (860, 23074), (1112, 17845), (1390, 14276), (1660, 11954), (1720, 11537), (2780, 7138), (3320, 5977), (3569, 5560)]