890998420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{263609}}^1$

素因数の和:263644

約数の個数: 36

約数和(自身を含む): 2026106460

約数和(自身を除く): 1135108040

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 676, 845, 1690, 3380, 263609, 527218, 1054436, 1318045, 2636090, 3426917, 5272180, 6853834, 13707668, 17134585, 34269170, 44549921, 68538340, 89099842, 178199684, 222749605, 445499210, 890998420]

約数ペア:

[(1, 890998420), (2, 445499210), (4, 222749605), (5, 178199684), (10, 89099842), (13, 68538340), (20, 44549921), (26, 34269170), (52, 17134585), (65, 13707668), (130, 6853834), (169, 5272180), (260, 3426917), (338, 2636090), (676, 1318045), (845, 1054436), (1690, 527218), (3380, 263609)]