20999575

素因数分解:

$5^2\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{619}}^1$

素因数の和:711

約数の個数: 24

約数和(自身を含む): 27676800

約数和(自身を除く): 6677225

約数列:

[1, 5, 23, 25, 59, 115, 295, 575, 619, 1357, 1475, 3095, 6785, 14237, 15475, 33925, 36521, 71185, 182605, 355925, 839983, 913025, 4199915, 20999575]

約数ペア:

[(1, 20999575), (5, 4199915), (23, 913025), (25, 839983), (59, 355925), (115, 182605), (295, 71185), (575, 36521), (619, 33925), (1357, 15475), (1475, 14237), (3095, 6785)]