251620280

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{153427}}^1$

素因数の和:153479

約数の個数: 32

約数和(自身を含む): 579957840

約数和(自身を除く): 328337560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 153427, 306854, 613708, 767135, 1227416, 1534270, 3068540, 6137080, 6290507, 12581014, 25162028, 31452535, 50324056, 62905070, 125810140, 251620280]

約数ペア:

[(1, 251620280), (2, 125810140), (4, 62905070), (5, 50324056), (8, 31452535), (10, 25162028), (20, 12581014), (40, 6290507), (41, 6137080), (82, 3068540), (164, 1534270), (205, 1227416), (328, 767135), (410, 613708), (820, 306854), (1640, 153427)]