18958280

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{3917}}^1$

素因数の和:3950

約数の個数: 48

約数和(自身を含む): 46898460

約数和(自身を除く): 27940180

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 121, 220, 242, 440, 484, 605, 968, 1210, 2420, 3917, 4840, 7834, 15668, 19585, 31336, 39170, 43087, 78340, 86174, 156680, 172348, 215435, 344696, 430870, 473957, 861740, 947914, 1723480, 1895828, 2369785, 3791656, 4739570, 9479140, 18958280]

約数ペア:

[(1, 18958280), (2, 9479140), (4, 4739570), (5, 3791656), (8, 2369785), (10, 1895828), (11, 1723480), (20, 947914), (22, 861740), (40, 473957), (44, 430870), (55, 344696), (88, 215435), (110, 172348), (121, 156680), (220, 86174), (242, 78340), (440, 43087), (484, 39170), (605, 31336), (968, 19585), (1210, 15668), (2420, 7834), (3917, 4840)]