18678740

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{641}}^1$

素因数の和:728

約数の個数: 48

約数和(自身を含む): 41416704

約数和(自身を除く): 22737964

約数列:

[1, 2, 4, 5, 10, 20, 31, 47, 62, 94, 124, 155, 188, 235, 310, 470, 620, 641, 940, 1282, 1457, 2564, 2914, 3205, 5828, 6410, 7285, 12820, 14570, 19871, 29140, 30127, 39742, 60254, 79484, 99355, 120508, 150635, 198710, 301270, 397420, 602540, 933937, 1867874, 3735748, 4669685, 9339370, 18678740]

約数ペア:

[(1, 18678740), (2, 9339370), (4, 4669685), (5, 3735748), (10, 1867874), (20, 933937), (31, 602540), (47, 397420), (62, 301270), (94, 198710), (124, 150635), (155, 120508), (188, 99355), (235, 79484), (310, 60254), (470, 39742), (620, 30127), (641, 29140), (940, 19871), (1282, 14570), (1457, 12820), (2564, 7285), (2914, 6410), (3205, 5828)]