20881875

素因数分解:

$3^1\times 5^4\times 7^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1$

素因数の和:110

約数の個数: 80

約数和(自身を含む): 41786624

約数和(自身を除く): 20904749

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 37, 43, 75, 105, 111, 125, 129, 175, 185, 215, 259, 301, 375, 525, 555, 625, 645, 777, 875, 903, 925, 1075, 1295, 1505, 1591, 1875, 2625, 2775, 3225, 3885, 4375, 4515, 4625, 4773, 5375, 6475, 7525, 7955, 11137, 13125, 13875, 16125, 19425, 22575, 23125, 23865, 26875, 32375, 33411, 37625, 39775, 55685, 69375, 80625, 97125, 112875, 119325, 161875, 167055, 188125, 198875, 278425, 485625, 564375, 596625, 835275, 994375, 1392125, 2983125, 4176375, 6960625, 20881875]

約数ペア:

[(1, 20881875), (3, 6960625), (5, 4176375), (7, 2983125), (15, 1392125), (21, 994375), (25, 835275), (35, 596625), (37, 564375), (43, 485625), (75, 278425), (105, 198875), (111, 188125), (125, 167055), (129, 161875), (175, 119325), (185, 112875), (215, 97125), (259, 80625), (301, 69375), (375, 55685), (525, 39775), (555, 37625), (625, 33411), (645, 32375), (777, 26875), (875, 23865), (903, 23125), (925, 22575), (1075, 19425), (1295, 16125), (1505, 13875), (1591, 13125), (1875, 11137), (2625, 7955), (2775, 7525), (3225, 6475), (3885, 5375), (4375, 4773), (4515, 4625)]