19995560

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{38453}}^1$

素因数の和:38477

約数の個数: 32

約数和(自身を含む): 48452040

約数和(自身を除く): 28456480

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 38453, 76906, 153812, 192265, 307624, 384530, 499889, 769060, 999778, 1538120, 1999556, 2499445, 3999112, 4998890, 9997780, 19995560]

約数ペア:

[(1, 19995560), (2, 9997780), (4, 4998890), (5, 3999112), (8, 2499445), (10, 1999556), (13, 1538120), (20, 999778), (26, 769060), (40, 499889), (52, 384530), (65, 307624), (104, 192265), (130, 153812), (260, 76906), (520, 38453)]