21987655

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{347}}^1$

素因数の和:423

約数の個数: 32

約数和(自身を含む): 30067200

約数和(自身を除く): 8079545

約数列:

[1, 5, 19, 23, 29, 95, 115, 145, 347, 437, 551, 667, 1735, 2185, 2755, 3335, 6593, 7981, 10063, 12673, 32965, 39905, 50315, 63365, 151639, 191197, 231449, 758195, 955985, 1157245, 4397531, 21987655]

約数ペア:

[(1, 21987655), (5, 4397531), (19, 1157245), (23, 955985), (29, 758195), (95, 231449), (115, 191197), (145, 151639), (347, 63365), (437, 50315), (551, 39905), (667, 32965), (1735, 12673), (2185, 10063), (2755, 7981), (3335, 6593)]