21389566

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{397}}^1$

素因数の和:520

約数の個数: 32

約数和(自身を含む): 36679680

約数和(自身を除く): 15290114

約数列:

[1, 2, 11, 22, 31, 62, 79, 158, 341, 397, 682, 794, 869, 1738, 2449, 4367, 4898, 8734, 12307, 24614, 26939, 31363, 53878, 62726, 135377, 270754, 344993, 689986, 972253, 1944506, 10694783, 21389566]

約数ペア:

[(1, 21389566), (2, 10694783), (11, 1944506), (22, 972253), (31, 689986), (62, 344993), (79, 270754), (158, 135377), (341, 62726), (397, 53878), (682, 31363), (794, 26939), (869, 24614), (1738, 12307), (2449, 8734), (4367, 4898)]