20945440

素因数分解:

$2^5\times 5^1\times {\mathrm{109}}^1\times {\mathrm{1201}}^1$

素因数の和:1325

約数の個数: 48

約数和(自身を含む): 49979160

約数和(自身を除く): 29033720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 109, 160, 218, 436, 545, 872, 1090, 1201, 1744, 2180, 2402, 3488, 4360, 4804, 6005, 8720, 9608, 12010, 17440, 19216, 24020, 38432, 48040, 96080, 130909, 192160, 261818, 523636, 654545, 1047272, 1309090, 2094544, 2618180, 4189088, 5236360, 10472720, 20945440]

約数ペア:

[(1, 20945440), (2, 10472720), (4, 5236360), (5, 4189088), (8, 2618180), (10, 2094544), (16, 1309090), (20, 1047272), (32, 654545), (40, 523636), (80, 261818), (109, 192160), (160, 130909), (218, 96080), (436, 48040), (545, 38432), (872, 24020), (1090, 19216), (1201, 17440), (1744, 12010), (2180, 9608), (2402, 8720), (3488, 6005), (4360, 4804)]