21221403

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{331}}^1$

素因数の和:455

約数の個数: 32

約数和(自身を含む): 33656832

約数和(自身を除く): 12435429

約数列:

[1, 3, 7, 21, 43, 71, 129, 213, 301, 331, 497, 903, 993, 1491, 2317, 3053, 6951, 9159, 14233, 21371, 23501, 42699, 64113, 70503, 99631, 164507, 298893, 493521, 1010543, 3031629, 7073801, 21221403]

約数ペア:

[(1, 21221403), (3, 7073801), (7, 3031629), (21, 1010543), (43, 493521), (71, 298893), (129, 164507), (213, 99631), (301, 70503), (331, 64113), (497, 42699), (903, 23501), (993, 21371), (1491, 14233), (2317, 9159), (3053, 6951)]