21969775

素因数分解:

$5^2\times {\mathrm{43}}^1\times {\mathrm{107}}^1\times {\mathrm{191}}^1$

素因数の和:351

約数の個数: 24

約数和(自身を含む): 28283904

約数和(自身を除く): 6314129

約数列:

[1, 5, 25, 43, 107, 191, 215, 535, 955, 1075, 2675, 4601, 4775, 8213, 20437, 23005, 41065, 102185, 115025, 205325, 510925, 878791, 4393955, 21969775]

約数ペア:

[(1, 21969775), (5, 4393955), (25, 878791), (43, 510925), (107, 205325), (191, 115025), (215, 102185), (535, 41065), (955, 23005), (1075, 20437), (2675, 8213), (4601, 4775)]