21040175

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{1579}}^1$

素因数の和:1643

約数の個数: 24

約数和(自身を含む): 28800240

約数和(自身を除く): 7760065

約数列:

[1, 5, 13, 25, 41, 65, 205, 325, 533, 1025, 1579, 2665, 7895, 13325, 20527, 39475, 64739, 102635, 323695, 513175, 841607, 1618475, 4208035, 21040175]

約数ペア:

[(1, 21040175), (5, 4208035), (13, 1618475), (25, 841607), (41, 513175), (65, 323695), (205, 102635), (325, 64739), (533, 39475), (1025, 20527), (1579, 13325), (2665, 7895)]