28531840

素因数分解:

$2^7\times 5^1\times {\mathrm{109}}^1\times {\mathrm{409}}^1$

素因数の和:537

約数の個数: 64

約数和(自身を含む): 69003000

約数和(自身を除く): 40471160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 109, 128, 160, 218, 320, 409, 436, 545, 640, 818, 872, 1090, 1636, 1744, 2045, 2180, 3272, 3488, 4090, 4360, 6544, 6976, 8180, 8720, 13088, 13952, 16360, 17440, 26176, 32720, 34880, 44581, 52352, 65440, 69760, 89162, 130880, 178324, 222905, 261760, 356648, 445810, 713296, 891620, 1426592, 1783240, 2853184, 3566480, 5706368, 7132960, 14265920, 28531840]

約数ペア:

[(1, 28531840), (2, 14265920), (4, 7132960), (5, 5706368), (8, 3566480), (10, 2853184), (16, 1783240), (20, 1426592), (32, 891620), (40, 713296), (64, 445810), (80, 356648), (109, 261760), (128, 222905), (160, 178324), (218, 130880), (320, 89162), (409, 69760), (436, 65440), (545, 52352), (640, 44581), (818, 34880), (872, 32720), (1090, 26176), (1636, 17440), (1744, 16360), (2045, 13952), (2180, 13088), (3272, 8720), (3488, 8180), (4090, 6976), (4360, 6544)]