31531990

素因数分解:

$2^1\times 5^1\times 7^3\times {\mathrm{29}}^1\times {\mathrm{317}}^1$

素因数の和:374

約数の個数: 64

約数和(自身を含む): 68688000

約数和(自身を除く): 37156010

約数列:

[1, 2, 5, 7, 10, 14, 29, 35, 49, 58, 70, 98, 145, 203, 245, 290, 317, 343, 406, 490, 634, 686, 1015, 1421, 1585, 1715, 2030, 2219, 2842, 3170, 3430, 4438, 7105, 9193, 9947, 11095, 14210, 15533, 18386, 19894, 22190, 31066, 45965, 49735, 64351, 77665, 91930, 99470, 108731, 128702, 155330, 217462, 321755, 450457, 543655, 643510, 900914, 1087310, 2252285, 3153199, 4504570, 6306398, 15765995, 31531990]

約数ペア:

[(1, 31531990), (2, 15765995), (5, 6306398), (7, 4504570), (10, 3153199), (14, 2252285), (29, 1087310), (35, 900914), (49, 643510), (58, 543655), (70, 450457), (98, 321755), (145, 217462), (203, 155330), (245, 128702), (290, 108731), (317, 99470), (343, 91930), (406, 77665), (490, 64351), (634, 49735), (686, 45965), (1015, 31066), (1421, 22190), (1585, 19894), (1715, 18386), (2030, 15533), (2219, 14210), (2842, 11095), (3170, 9947), (3430, 9193), (4438, 7105)]