257484630

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{660217}}^1$

素因数の和:660240

約数の個数: 32

約数和(自身を含む): 665499744

約数和(自身を除く): 408015114

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 660217, 1320434, 1980651, 3301085, 3961302, 6602170, 8582821, 9903255, 17165642, 19806510, 25748463, 42914105, 51496926, 85828210, 128742315, 257484630]

約数ペア:

[(1, 257484630), (2, 128742315), (3, 85828210), (5, 51496926), (6, 42914105), (10, 25748463), (13, 19806510), (15, 17165642), (26, 9903255), (30, 8582821), (39, 6602170), (65, 3961302), (78, 3301085), (130, 1980651), (195, 1320434), (390, 660217)]