20951440

素因数分解:

$2^4\times 5^1\times {\mathrm{101}}^1\times {\mathrm{2593}}^1$

素因数の和:2707

約数の個数: 40

約数和(自身を含む): 49213368

約数和(自身を除く): 28261928

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 101, 202, 404, 505, 808, 1010, 1616, 2020, 2593, 4040, 5186, 8080, 10372, 12965, 20744, 25930, 41488, 51860, 103720, 207440, 261893, 523786, 1047572, 1309465, 2095144, 2618930, 4190288, 5237860, 10475720, 20951440]

約数ペア:

[(1, 20951440), (2, 10475720), (4, 5237860), (5, 4190288), (8, 2618930), (10, 2095144), (16, 1309465), (20, 1047572), (40, 523786), (80, 261893), (101, 207440), (202, 103720), (404, 51860), (505, 41488), (808, 25930), (1010, 20744), (1616, 12965), (2020, 10372), (2593, 8080), (4040, 5186)]