18987440

素因数分解:

$2^4\times 5^1\times {\mathrm{237343}}^1$

素因数の和:237356

約数の個数: 20

約数和(自身を含む): 44145984

約数和(自身を除く): 25158544

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 237343, 474686, 949372, 1186715, 1898744, 2373430, 3797488, 4746860, 9493720, 18987440]

約数ペア:

[(1, 18987440), (2, 9493720), (4, 4746860), (5, 3797488), (8, 2373430), (10, 1898744), (16, 1186715), (20, 949372), (40, 474686), (80, 237343)]