18438440

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4229}}^1$

素因数の和:4349

約数の個数: 32

約数和(自身を含む): 41877000

約数和(自身を除く): 23438560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4229, 4360, 8458, 16916, 21145, 33832, 42290, 84580, 169160, 460961, 921922, 1843844, 2304805, 3687688, 4609610, 9219220, 18438440]

約数ペア:

[(1, 18438440), (2, 9219220), (4, 4609610), (5, 3687688), (8, 2304805), (10, 1843844), (20, 921922), (40, 460961), (109, 169160), (218, 84580), (436, 42290), (545, 33832), (872, 21145), (1090, 16916), (2180, 8458), (4229, 4360)]