18311420

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{137}}^1\times {\mathrm{163}}^1$

素因数の和:350

約数の個数: 48

約数和(自身を含む): 39922848

約数和(自身を除く): 21611428

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 137, 163, 164, 205, 274, 326, 410, 548, 652, 685, 815, 820, 1370, 1630, 2740, 3260, 5617, 6683, 11234, 13366, 22331, 22468, 26732, 28085, 33415, 44662, 56170, 66830, 89324, 111655, 112340, 133660, 223310, 446620, 915571, 1831142, 3662284, 4577855, 9155710, 18311420]

約数ペア:

[(1, 18311420), (2, 9155710), (4, 4577855), (5, 3662284), (10, 1831142), (20, 915571), (41, 446620), (82, 223310), (137, 133660), (163, 112340), (164, 111655), (205, 89324), (274, 66830), (326, 56170), (410, 44662), (548, 33415), (652, 28085), (685, 26732), (815, 22468), (820, 22331), (1370, 13366), (1630, 11234), (2740, 6683), (3260, 5617)]