20157075

素因数分解:

$3^2\times 5^2\times {\mathrm{101}}^1\times {\mathrm{887}}^1$

素因数の和:1004

約数の個数: 36

約数和(自身を含む): 36502128

約数和(自身を除く): 16345053

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 101, 225, 303, 505, 887, 909, 1515, 2525, 2661, 4435, 4545, 7575, 7983, 13305, 22175, 22725, 39915, 66525, 89587, 199575, 268761, 447935, 806283, 1343805, 2239675, 4031415, 6719025, 20157075]

約数ペア:

[(1, 20157075), (3, 6719025), (5, 4031415), (9, 2239675), (15, 1343805), (25, 806283), (45, 447935), (75, 268761), (101, 199575), (225, 89587), (303, 66525), (505, 39915), (887, 22725), (909, 22175), (1515, 13305), (2525, 7983), (2661, 7575), (4435, 4545)]