18985145

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{227}}^1\times {\mathrm{389}}^1$

素因数の和:664

約数の個数: 16

約数和(自身を含む): 23474880

約数和(自身を除く): 4489735

約数列:

[1, 5, 43, 215, 227, 389, 1135, 1945, 9761, 16727, 48805, 83635, 88303, 441515, 3797029, 18985145]

約数ペア:

[(1, 18985145), (5, 3797029), (43, 441515), (215, 88303), (227, 83635), (389, 48805), (1135, 16727), (1945, 9761)]