21237325

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{409}}^1$

素因数の和:517

約数の個数: 24

約数和(自身を含む): 27656960

約数和(自身を除く): 6419635

約数列:

[1, 5, 25, 31, 67, 155, 335, 409, 775, 1675, 2045, 2077, 10225, 10385, 12679, 27403, 51925, 63395, 137015, 316975, 685075, 849493, 4247465, 21237325]

約数ペア:

[(1, 21237325), (5, 4247465), (25, 849493), (31, 685075), (67, 316975), (155, 137015), (335, 63395), (409, 51925), (775, 27403), (1675, 12679), (2045, 10385), (2077, 10225)]