21012425

素因数分解:

$5^2\times 7^2\times {\mathrm{17}}^1\times {\mathrm{1009}}^1$

素因数の和:1050

約数の個数: 36

約数和(自身を含む): 32124060

約数和(自身を除く): 11111635

約数列:

[1, 5, 7, 17, 25, 35, 49, 85, 119, 175, 245, 425, 595, 833, 1009, 1225, 2975, 4165, 5045, 7063, 17153, 20825, 25225, 35315, 49441, 85765, 120071, 176575, 247205, 428825, 600355, 840497, 1236025, 3001775, 4202485, 21012425]

約数ペア:

[(1, 21012425), (5, 4202485), (7, 3001775), (17, 1236025), (25, 840497), (35, 600355), (49, 428825), (85, 247205), (119, 176575), (175, 120071), (245, 85765), (425, 49441), (595, 35315), (833, 25225), (1009, 20825), (1225, 17153), (2975, 7063), (4165, 5045)]