78456890

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^2\times {\mathrm{491}}^1$

素因数の和:575

約数の個数: 48

約数和(自身を含む): 154271520

約数和(自身を除く): 75814630

約数列:

[1, 2, 5, 10, 19, 29, 38, 58, 95, 145, 190, 290, 491, 551, 841, 982, 1102, 1682, 2455, 2755, 4205, 4910, 5510, 8410, 9329, 14239, 15979, 18658, 28478, 31958, 46645, 71195, 79895, 93290, 142390, 159790, 270541, 412931, 541082, 825862, 1352705, 2064655, 2705410, 4129310, 7845689, 15691378, 39228445, 78456890]

約数ペア:

[(1, 78456890), (2, 39228445), (5, 15691378), (10, 7845689), (19, 4129310), (29, 2705410), (38, 2064655), (58, 1352705), (95, 825862), (145, 541082), (190, 412931), (290, 270541), (491, 159790), (551, 142390), (841, 93290), (982, 79895), (1102, 71195), (1682, 46645), (2455, 31958), (2755, 28478), (4205, 18658), (4910, 15979), (5510, 14239), (8410, 9329)]