16978280

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{821}}^1$

素因数の和:890

約数の個数: 64

約数和(自身を含む): 42612480

約数和(自身を除く): 25634200

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 47, 55, 88, 94, 110, 188, 220, 235, 376, 440, 470, 517, 821, 940, 1034, 1642, 1880, 2068, 2585, 3284, 4105, 4136, 5170, 6568, 8210, 9031, 10340, 16420, 18062, 20680, 32840, 36124, 38587, 45155, 72248, 77174, 90310, 154348, 180620, 192935, 308696, 361240, 385870, 424457, 771740, 848914, 1543480, 1697828, 2122285, 3395656, 4244570, 8489140, 16978280]

約数ペア:

[(1, 16978280), (2, 8489140), (4, 4244570), (5, 3395656), (8, 2122285), (10, 1697828), (11, 1543480), (20, 848914), (22, 771740), (40, 424457), (44, 385870), (47, 361240), (55, 308696), (88, 192935), (94, 180620), (110, 154348), (188, 90310), (220, 77174), (235, 72248), (376, 45155), (440, 38587), (470, 36124), (517, 32840), (821, 20680), (940, 18062), (1034, 16420), (1642, 10340), (1880, 9031), (2068, 8210), (2585, 6568), (3284, 5170), (4105, 4136)]