31389890

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{47}}^2$

素因数の和:144

約数の個数: 72

約数和(自身を含む): 69470460

約数和(自身を除く): 38080570

約数列:

[1, 2, 5, 7, 10, 14, 29, 35, 47, 49, 58, 70, 94, 98, 145, 203, 235, 245, 290, 329, 406, 470, 490, 658, 1015, 1363, 1421, 1645, 2030, 2209, 2303, 2726, 2842, 3290, 4418, 4606, 6815, 7105, 9541, 11045, 11515, 13630, 14210, 15463, 19082, 22090, 23030, 30926, 47705, 64061, 66787, 77315, 95410, 108241, 128122, 133574, 154630, 216482, 320305, 333935, 448427, 541205, 640610, 667870, 896854, 1082410, 2242135, 3138989, 4484270, 6277978, 15694945, 31389890]

約数ペア:

[(1, 31389890), (2, 15694945), (5, 6277978), (7, 4484270), (10, 3138989), (14, 2242135), (29, 1082410), (35, 896854), (47, 667870), (49, 640610), (58, 541205), (70, 448427), (94, 333935), (98, 320305), (145, 216482), (203, 154630), (235, 133574), (245, 128122), (290, 108241), (329, 95410), (406, 77315), (470, 66787), (490, 64061), (658, 47705), (1015, 30926), (1363, 23030), (1421, 22090), (1645, 19082), (2030, 15463), (2209, 14210), (2303, 13630), (2726, 11515), (2842, 11045), (3290, 9541), (4418, 7105), (4606, 6815)]