81717080

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{113}}^1\times {\mathrm{179}}^1$

素因数の和:404

約数の個数: 64

約数和(自身を含む): 188373600

約数和(自身を除く): 106656520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 113, 179, 202, 226, 358, 404, 452, 505, 565, 716, 808, 895, 904, 1010, 1130, 1432, 1790, 2020, 2260, 3580, 4040, 4520, 7160, 11413, 18079, 20227, 22826, 36158, 40454, 45652, 57065, 72316, 80908, 90395, 91304, 101135, 114130, 144632, 161816, 180790, 202270, 228260, 361580, 404540, 456520, 723160, 809080, 2042927, 4085854, 8171708, 10214635, 16343416, 20429270, 40858540, 81717080]

約数ペア:

[(1, 81717080), (2, 40858540), (4, 20429270), (5, 16343416), (8, 10214635), (10, 8171708), (20, 4085854), (40, 2042927), (101, 809080), (113, 723160), (179, 456520), (202, 404540), (226, 361580), (358, 228260), (404, 202270), (452, 180790), (505, 161816), (565, 144632), (716, 114130), (808, 101135), (895, 91304), (904, 90395), (1010, 80908), (1130, 72316), (1432, 57065), (1790, 45652), (2020, 40454), (2260, 36158), (3580, 22826), (4040, 20227), (4520, 18079), (7160, 11413)]