21651925

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{577}}^1$

素因数の和:685

約数の個数: 24

約数和(自身を含む): 28668800

約数和(自身を除く): 7016875

約数列:

[1, 5, 19, 25, 79, 95, 395, 475, 577, 1501, 1975, 2885, 7505, 10963, 14425, 37525, 45583, 54815, 227915, 274075, 866077, 1139575, 4330385, 21651925]

約数ペア:

[(1, 21651925), (5, 4330385), (19, 1139575), (25, 866077), (79, 274075), (95, 227915), (395, 54815), (475, 45583), (577, 37525), (1501, 14425), (1975, 10963), (2885, 7505)]