221479660

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{140177}}^1$

素因数の和:140265

約数の個数: 24

約数和(自身を含む): 470998080

約数和(自身を除く): 249518420

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 140177, 280354, 560708, 700885, 1401770, 2803540, 11073983, 22147966, 44295932, 55369915, 110739830, 221479660]

約数ペア:

[(1, 221479660), (2, 110739830), (4, 55369915), (5, 44295932), (10, 22147966), (20, 11073983), (79, 2803540), (158, 1401770), (316, 700885), (395, 560708), (790, 280354), (1580, 140177)]