20721736

素因数分解:

$2^3\times 7^1\times {\mathrm{47}}^1\times {\mathrm{7873}}^1$

素因数の和:7933

約数の個数: 32

約数和(自身を含む): 45354240

約数和(自身を除く): 24632504

約数列:

[1, 2, 4, 7, 8, 14, 28, 47, 56, 94, 188, 329, 376, 658, 1316, 2632, 7873, 15746, 31492, 55111, 62984, 110222, 220444, 370031, 440888, 740062, 1480124, 2590217, 2960248, 5180434, 10360868, 20721736]

約数ペア:

[(1, 20721736), (2, 10360868), (4, 5180434), (7, 2960248), (8, 2590217), (14, 1480124), (28, 740062), (47, 440888), (56, 370031), (94, 220444), (188, 110222), (329, 62984), (376, 55111), (658, 31492), (1316, 15746), (2632, 7873)]