21165628

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{13001}}^1$

素因数の和:13053

約数の個数: 24

約数和(自身を含む): 41502384

約数和(自身を除く): 20336756

約数列:

[1, 2, 4, 11, 22, 37, 44, 74, 148, 407, 814, 1628, 13001, 26002, 52004, 143011, 286022, 481037, 572044, 962074, 1924148, 5291407, 10582814, 21165628]

約数ペア:

[(1, 21165628), (2, 10582814), (4, 5291407), (11, 1924148), (22, 962074), (37, 572044), (44, 481037), (74, 286022), (148, 143011), (407, 52004), (814, 26002), (1628, 13001)]