221479480

素因数分解:

$2^3\times 5^1\times {\mathrm{571}}^1\times {\mathrm{9697}}^1$

素因数の和:10279

約数の個数: 32

約数和(自身を含む): 499253040

約数和(自身を除く): 277773560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 571, 1142, 2284, 2855, 4568, 5710, 9697, 11420, 19394, 22840, 38788, 48485, 77576, 96970, 193940, 387880, 5536987, 11073974, 22147948, 27684935, 44295896, 55369870, 110739740, 221479480]

約数ペア:

[(1, 221479480), (2, 110739740), (4, 55369870), (5, 44295896), (8, 27684935), (10, 22147948), (20, 11073974), (40, 5536987), (571, 387880), (1142, 193940), (2284, 96970), (2855, 77576), (4568, 48485), (5710, 38788), (9697, 22840), (11420, 19394)]