642051249

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{20369}}^1$

素因数の和:20477

約数の個数: 32

約数和(自身を含む): 1042944000

約数和(自身を除く): 400892751

約数列:

[1, 3, 7, 19, 21, 57, 79, 133, 237, 399, 553, 1501, 1659, 4503, 10507, 20369, 31521, 61107, 142583, 387011, 427749, 1161033, 1609151, 2709077, 4827453, 8127231, 11264057, 30573869, 33792171, 91721607, 214017083, 642051249]

約数ペア:

[(1, 642051249), (3, 214017083), (7, 91721607), (19, 33792171), (21, 30573869), (57, 11264057), (79, 8127231), (133, 4827453), (237, 2709077), (399, 1609151), (553, 1161033), (1501, 427749), (1659, 387011), (4503, 142583), (10507, 61107), (20369, 31521)]