20136875

素因数分解:

$5^4\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{101}}^1$

素因数の和:161

約数の個数: 40

約数和(自身を含む): 28678320

約数和(自身を除く): 8541445

約数列:

[1, 5, 11, 25, 29, 55, 101, 125, 145, 275, 319, 505, 625, 725, 1111, 1375, 1595, 2525, 2929, 3625, 5555, 6875, 7975, 12625, 14645, 18125, 27775, 32219, 39875, 63125, 73225, 138875, 161095, 199375, 366125, 694375, 805475, 1830625, 4027375, 20136875]

約数ペア:

[(1, 20136875), (5, 4027375), (11, 1830625), (25, 805475), (29, 694375), (55, 366125), (101, 199375), (125, 161095), (145, 138875), (275, 73225), (319, 63125), (505, 39875), (625, 32219), (725, 27775), (1111, 18125), (1375, 14645), (1595, 12625), (2525, 7975), (2929, 6875), (3625, 5555)]