31243760

素因数分解:

$2^4\times 5^1\times {\mathrm{109}}^1\times {\mathrm{3583}}^1$

素因数の和:3705

約数の個数: 40

約数和(自身を含む): 73328640

約数和(自身を除く): 42084880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 109, 218, 436, 545, 872, 1090, 1744, 2180, 3583, 4360, 7166, 8720, 14332, 17915, 28664, 35830, 57328, 71660, 143320, 286640, 390547, 781094, 1562188, 1952735, 3124376, 3905470, 6248752, 7810940, 15621880, 31243760]

約数ペア:

[(1, 31243760), (2, 15621880), (4, 7810940), (5, 6248752), (8, 3905470), (10, 3124376), (16, 1952735), (20, 1562188), (40, 781094), (80, 390547), (109, 286640), (218, 143320), (436, 71660), (545, 57328), (872, 35830), (1090, 28664), (1744, 17915), (2180, 14332), (3583, 8720), (4360, 7166)]