19998902

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{7639}}^1$

素因数の和:7676

約数の個数: 32

約数和(自身を含む): 39605760

約数和(自身を除く): 19606858

約数列:

[1, 2, 7, 11, 14, 17, 22, 34, 77, 119, 154, 187, 238, 374, 1309, 2618, 7639, 15278, 53473, 84029, 106946, 129863, 168058, 259726, 588203, 909041, 1176406, 1428493, 1818082, 2856986, 9999451, 19998902]

約数ペア:

[(1, 19998902), (2, 9999451), (7, 2856986), (11, 1818082), (14, 1428493), (17, 1176406), (22, 909041), (34, 588203), (77, 259726), (119, 168058), (154, 129863), (187, 106946), (238, 84029), (374, 53473), (1309, 15278), (2618, 7639)]