66628280

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{40627}}^1$

素因数の和:40679

約数の個数: 32

約数和(自身を含む): 153573840

約数和(自身を除く): 86945560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 40627, 81254, 162508, 203135, 325016, 406270, 812540, 1625080, 1665707, 3331414, 6662828, 8328535, 13325656, 16657070, 33314140, 66628280]

約数ペア:

[(1, 66628280), (2, 33314140), (4, 16657070), (5, 13325656), (8, 8328535), (10, 6662828), (20, 3331414), (40, 1665707), (41, 1625080), (82, 812540), (164, 406270), (205, 325016), (328, 203135), (410, 162508), (820, 81254), (1640, 40627)]