18016720

素因数分解:

$2^4\times 5^1\times {\mathrm{113}}^1\times {\mathrm{1993}}^1$

素因数の和:2119

約数の個数: 40

約数和(自身を含む): 42280776

約数和(自身を除く): 24264056

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 113, 226, 452, 565, 904, 1130, 1808, 1993, 2260, 3986, 4520, 7972, 9040, 9965, 15944, 19930, 31888, 39860, 79720, 159440, 225209, 450418, 900836, 1126045, 1801672, 2252090, 3603344, 4504180, 9008360, 18016720]

約数ペア:

[(1, 18016720), (2, 9008360), (4, 4504180), (5, 3603344), (8, 2252090), (10, 1801672), (16, 1126045), (20, 900836), (40, 450418), (80, 225209), (113, 159440), (226, 79720), (452, 39860), (565, 31888), (904, 19930), (1130, 15944), (1808, 9965), (1993, 9040), (2260, 7972), (3986, 4520)]