261389375

素因数分解:

$5^4\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{607}}^1$

素因数の和:693

約数の個数: 40

約数和(自身を含む): 358985088

約数和(自身を除く): 97595713

約数列:

[1, 5, 13, 25, 53, 65, 125, 265, 325, 607, 625, 689, 1325, 1625, 3035, 3445, 6625, 7891, 8125, 15175, 17225, 32171, 33125, 39455, 75875, 86125, 160855, 197275, 379375, 418223, 430625, 804275, 986375, 2091115, 4021375, 4931875, 10455575, 20106875, 52277875, 261389375]

約数ペア:

[(1, 261389375), (5, 52277875), (13, 20106875), (25, 10455575), (53, 4931875), (65, 4021375), (125, 2091115), (265, 986375), (325, 804275), (607, 430625), (625, 418223), (689, 379375), (1325, 197275), (1625, 160855), (3035, 86125), (3445, 75875), (6625, 39455), (7891, 33125), (8125, 32171), (15175, 17225)]