21438515

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{19759}}^1$

素因数の和:19802

約数の個数: 16

約数和(自身を含む): 30351360

約数和(自身を除く): 8912845

約数列:

[1, 5, 7, 31, 35, 155, 217, 1085, 19759, 98795, 138313, 612529, 691565, 3062645, 4287703, 21438515]

約数ペア:

[(1, 21438515), (5, 4287703), (7, 3062645), (31, 691565), (35, 612529), (155, 138313), (217, 98795), (1085, 19759)]