21312538

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{19993}}^1$

素因数の和:20049

約数の個数: 16

約数和(自身を含む): 35269416

約数和(自身を除く): 13956878

約数列:

[1, 2, 13, 26, 41, 82, 533, 1066, 19993, 39986, 259909, 519818, 819713, 1639426, 10656269, 21312538]

約数ペア:

[(1, 21312538), (2, 10656269), (13, 1639426), (26, 819713), (41, 519818), (82, 259909), (533, 39986), (1066, 19993)]