21620090

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{7481}}^1$

素因数の和:7522

約数の個数: 24

約数和(自身を含む): 41345532

約数和(自身を除く): 19725442

約数列:

[1, 2, 5, 10, 17, 34, 85, 170, 289, 578, 1445, 2890, 7481, 14962, 37405, 74810, 127177, 254354, 635885, 1271770, 2162009, 4324018, 10810045, 21620090]

約数ペア:

[(1, 21620090), (2, 10810045), (5, 4324018), (10, 2162009), (17, 1271770), (34, 635885), (85, 254354), (170, 127177), (289, 74810), (578, 37405), (1445, 14962), (2890, 7481)]