21990959949

素因数分解:

$3^1\times 7^2\times {\mathrm{211}}^1\times {\mathrm{708997}}^1$

素因数の和:709225

約数の個数: 24

約数和(自身を含む): 34270127328

約数和(自身を除く): 12279167379

約数列:

[1, 3, 7, 21, 49, 147, 211, 633, 1477, 4431, 10339, 31017, 708997, 2126991, 4962979, 14888937, 34740853, 104222559, 149598367, 448795101, 1047188569, 3141565707, 7330319983, 21990959949]

約数ペア:

[(1, 21990959949), (3, 7330319983), (7, 3141565707), (21, 1047188569), (49, 448795101), (147, 149598367), (211, 104222559), (633, 34740853), (1477, 14888937), (4431, 4962979), (10339, 2126991), (31017, 708997)]