28431560

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{6521}}^1$

素因数の和:6641

約数の個数: 32

約数和(自身を含む): 64567800

約数和(自身を除く): 36136240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 6521, 13042, 26084, 32605, 52168, 65210, 130420, 260840, 710789, 1421578, 2843156, 3553945, 5686312, 7107890, 14215780, 28431560]

約数ペア:

[(1, 28431560), (2, 14215780), (4, 7107890), (5, 5686312), (8, 3553945), (10, 2843156), (20, 1421578), (40, 710789), (109, 260840), (218, 130420), (436, 65210), (545, 52168), (872, 32605), (1090, 26084), (2180, 13042), (4360, 6521)]