51722920

素因数分解:

$2^3\times 5^1\times {\mathrm{643}}^1\times {\mathrm{2011}}^1$

素因数の和:2665

約数の個数: 32

約数和(自身を含む): 116615520

約数和(自身を除く): 64892600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 643, 1286, 2011, 2572, 3215, 4022, 5144, 6430, 8044, 10055, 12860, 16088, 20110, 25720, 40220, 80440, 1293073, 2586146, 5172292, 6465365, 10344584, 12930730, 25861460, 51722920]

約数ペア:

[(1, 51722920), (2, 25861460), (4, 12930730), (5, 10344584), (8, 6465365), (10, 5172292), (20, 2586146), (40, 1293073), (643, 80440), (1286, 40220), (2011, 25720), (2572, 20110), (3215, 16088), (4022, 12860), (5144, 10055), (6430, 8044)]