256400830

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{43}}^2\times {\mathrm{283}}^1$

素因数の和:390

約数の個数: 72

約数和(自身を含む): 551589912

約数和(自身を除く): 295189082

約数列:

[1, 2, 5, 7, 10, 14, 35, 43, 49, 70, 86, 98, 215, 245, 283, 301, 430, 490, 566, 602, 1415, 1505, 1849, 1981, 2107, 2830, 3010, 3698, 3962, 4214, 9245, 9905, 10535, 12169, 12943, 13867, 18490, 19810, 21070, 24338, 25886, 27734, 60845, 64715, 69335, 85183, 90601, 121690, 129430, 138670, 170366, 181202, 425915, 453005, 523267, 596281, 851830, 906010, 1046534, 1192562, 2616335, 2981405, 3662869, 5232670, 5962810, 7325738, 18314345, 25640083, 36628690, 51280166, 128200415, 256400830]

約数ペア:

[(1, 256400830), (2, 128200415), (5, 51280166), (7, 36628690), (10, 25640083), (14, 18314345), (35, 7325738), (43, 5962810), (49, 5232670), (70, 3662869), (86, 2981405), (98, 2616335), (215, 1192562), (245, 1046534), (283, 906010), (301, 851830), (430, 596281), (490, 523267), (566, 453005), (602, 425915), (1415, 181202), (1505, 170366), (1849, 138670), (1981, 129430), (2107, 121690), (2830, 90601), (3010, 85183), (3698, 69335), (3962, 64715), (4214, 60845), (9245, 27734), (9905, 25886), (10535, 24338), (12169, 21070), (12943, 19810), (13867, 18490)]