420940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1619}}^1$

素因数の和:1641

約数の個数: 24

約数和(自身を含む): 952560

約数和(自身を除く): 531620

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 1619, 3238, 6476, 8095, 16190, 21047, 32380, 42094, 84188, 105235, 210470, 420940]

約数ペア:

[(1, 420940), (2, 210470), (4, 105235), (5, 84188), (10, 42094), (13, 32380), (20, 21047), (26, 16190), (52, 8095), (65, 6476), (130, 3238), (260, 1619)]