18786620

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{157}}^1\times {\mathrm{193}}^1$

素因数の和:390

約数の個数: 48

約数和(自身を含む): 41196288

約数和(自身を除く): 22409668

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 157, 193, 310, 314, 386, 620, 628, 772, 785, 965, 1570, 1930, 3140, 3860, 4867, 5983, 9734, 11966, 19468, 23932, 24335, 29915, 30301, 48670, 59830, 60602, 97340, 119660, 121204, 151505, 303010, 606020, 939331, 1878662, 3757324, 4696655, 9393310, 18786620]

約数ペア:

[(1, 18786620), (2, 9393310), (4, 4696655), (5, 3757324), (10, 1878662), (20, 939331), (31, 606020), (62, 303010), (124, 151505), (155, 121204), (157, 119660), (193, 97340), (310, 60602), (314, 59830), (386, 48670), (620, 30301), (628, 29915), (772, 24335), (785, 23932), (965, 19468), (1570, 11966), (1930, 9734), (3140, 5983), (3860, 4867)]