21997775

素因数分解:

$5^2\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{571}}^1$

素因数の和:671

約数の個数: 24

約数和(自身を含む): 28938624

約数和(自身を除く): 6940849

約数列:

[1, 5, 23, 25, 67, 115, 335, 571, 575, 1541, 1675, 2855, 7705, 13133, 14275, 38257, 38525, 65665, 191285, 328325, 879911, 956425, 4399555, 21997775]

約数ペア:

[(1, 21997775), (5, 4399555), (23, 956425), (25, 879911), (67, 328325), (115, 191285), (335, 65665), (571, 38525), (575, 38257), (1541, 14275), (1675, 13133), (2855, 7705)]