81438160

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{233}}^1\times {\mathrm{257}}^1$

素因数の和:520

約数の個数: 80

約数和(自身を含む): 202125456

約数和(自身を除く): 120687296

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 233, 257, 272, 340, 466, 514, 680, 932, 1028, 1165, 1285, 1360, 1864, 2056, 2330, 2570, 3728, 3961, 4112, 4369, 4660, 5140, 7922, 8738, 9320, 10280, 15844, 17476, 18640, 19805, 20560, 21845, 31688, 34952, 39610, 43690, 59881, 63376, 69904, 79220, 87380, 119762, 158440, 174760, 239524, 299405, 316880, 349520, 479048, 598810, 958096, 1017977, 1197620, 2035954, 2395240, 4071908, 4790480, 5089885, 8143816, 10179770, 16287632, 20359540, 40719080, 81438160]

約数ペア:

[(1, 81438160), (2, 40719080), (4, 20359540), (5, 16287632), (8, 10179770), (10, 8143816), (16, 5089885), (17, 4790480), (20, 4071908), (34, 2395240), (40, 2035954), (68, 1197620), (80, 1017977), (85, 958096), (136, 598810), (170, 479048), (233, 349520), (257, 316880), (272, 299405), (340, 239524), (466, 174760), (514, 158440), (680, 119762), (932, 87380), (1028, 79220), (1165, 69904), (1285, 63376), (1360, 59881), (1864, 43690), (2056, 39610), (2330, 34952), (2570, 31688), (3728, 21845), (3961, 20560), (4112, 19805), (4369, 18640), (4660, 17476), (5140, 15844), (7922, 10280), (8738, 9320)]