20713875

素因数分解:

$3^1\times 5^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{607}}^1$

素因数の和:645

約数の個数: 64

約数和(自身を含む): 42491904

約数和(自身を除く): 21778029

約数列:

[1, 3, 5, 7, 13, 15, 21, 25, 35, 39, 65, 75, 91, 105, 125, 175, 195, 273, 325, 375, 455, 525, 607, 875, 975, 1365, 1625, 1821, 2275, 2625, 3035, 4249, 4875, 6825, 7891, 9105, 11375, 12747, 15175, 21245, 23673, 34125, 39455, 45525, 55237, 63735, 75875, 106225, 118365, 165711, 197275, 227625, 276185, 318675, 531125, 591825, 828555, 986375, 1380925, 1593375, 2959125, 4142775, 6904625, 20713875]

約数ペア:

[(1, 20713875), (3, 6904625), (5, 4142775), (7, 2959125), (13, 1593375), (15, 1380925), (21, 986375), (25, 828555), (35, 591825), (39, 531125), (65, 318675), (75, 276185), (91, 227625), (105, 197275), (125, 165711), (175, 118365), (195, 106225), (273, 75875), (325, 63735), (375, 55237), (455, 45525), (525, 39455), (607, 34125), (875, 23673), (975, 21245), (1365, 15175), (1625, 12747), (1821, 11375), (2275, 9105), (2625, 7891), (3035, 6825), (4249, 4875)]