20983280

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8461}}^1$

素因数の和:8505

約数の個数: 40

約数和(自身を含む): 50365824

約数和(自身を除く): 29382544

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8461, 16922, 33844, 42305, 67688, 84610, 135376, 169220, 262291, 338440, 524582, 676880, 1049164, 1311455, 2098328, 2622910, 4196656, 5245820, 10491640, 20983280]

約数ペア:

[(1, 20983280), (2, 10491640), (4, 5245820), (5, 4196656), (8, 2622910), (10, 2098328), (16, 1311455), (20, 1049164), (31, 676880), (40, 524582), (62, 338440), (80, 262291), (124, 169220), (155, 135376), (248, 84610), (310, 67688), (496, 42305), (620, 33844), (1240, 16922), (2480, 8461)]