39920840

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{16361}}^1$

素因数の和:16433

約数の個数: 32

約数和(自身を含む): 91299960

約数和(自身を除く): 51379120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 16361, 32722, 65444, 81805, 130888, 163610, 327220, 654440, 998021, 1996042, 3992084, 4990105, 7984168, 9980210, 19960420, 39920840]

約数ペア:

[(1, 39920840), (2, 19960420), (4, 9980210), (5, 7984168), (8, 4990105), (10, 3992084), (20, 1996042), (40, 998021), (61, 654440), (122, 327220), (244, 163610), (305, 130888), (488, 81805), (610, 65444), (1220, 32722), (2440, 16361)]