21972237

素因数分解:

$3^1\times 7^3\times {\mathrm{131}}^1\times {\mathrm{163}}^1$

素因数の和:318

約数の個数: 32

約数和(自身を含む): 34636800

約数和(自身を除く): 12664563

約数列:

[1, 3, 7, 21, 49, 131, 147, 163, 343, 393, 489, 917, 1029, 1141, 2751, 3423, 6419, 7987, 19257, 21353, 23961, 44933, 55909, 64059, 134799, 149471, 167727, 448413, 1046297, 3138891, 7324079, 21972237]

約数ペア:

[(1, 21972237), (3, 7324079), (7, 3138891), (21, 1046297), (49, 448413), (131, 167727), (147, 149471), (163, 134799), (343, 64059), (393, 55909), (489, 44933), (917, 23961), (1029, 21353), (1141, 19257), (2751, 7987), (3423, 6419)]