21020643

素因数分解:

$3^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{163}}^1$

素因数の和:288

約数の個数: 48

約数和(自身を含む): 36840960

約数和(自身を除く): 15820317

約数列:

[1, 3, 7, 9, 21, 23, 63, 69, 89, 161, 163, 207, 267, 483, 489, 623, 801, 1141, 1449, 1467, 1869, 2047, 3423, 3749, 5607, 6141, 10269, 11247, 14329, 14507, 18423, 26243, 33741, 42987, 43521, 78729, 101549, 128961, 130563, 236187, 304647, 333661, 913941, 1000983, 2335627, 3002949, 7006881, 21020643]

約数ペア:

[(1, 21020643), (3, 7006881), (7, 3002949), (9, 2335627), (21, 1000983), (23, 913941), (63, 333661), (69, 304647), (89, 236187), (161, 130563), (163, 128961), (207, 101549), (267, 78729), (483, 43521), (489, 42987), (623, 33741), (801, 26243), (1141, 18423), (1449, 14507), (1467, 14329), (1869, 11247), (2047, 10269), (3423, 6141), (3749, 5607)]