21461180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{419}}^1$

素因数の和:638

約数の個数: 48

約数和(自身を含む): 48898080

約数和(自身を除く): 27436900

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 197, 260, 394, 419, 788, 838, 985, 1676, 1970, 2095, 2561, 3940, 4190, 5122, 5447, 8380, 10244, 10894, 12805, 21788, 25610, 27235, 51220, 54470, 82543, 108940, 165086, 330172, 412715, 825430, 1073059, 1650860, 2146118, 4292236, 5365295, 10730590, 21461180]

約数ペア:

[(1, 21461180), (2, 10730590), (4, 5365295), (5, 4292236), (10, 2146118), (13, 1650860), (20, 1073059), (26, 825430), (52, 412715), (65, 330172), (130, 165086), (197, 108940), (260, 82543), (394, 54470), (419, 51220), (788, 27235), (838, 25610), (985, 21788), (1676, 12805), (1970, 10894), (2095, 10244), (2561, 8380), (3940, 5447), (4190, 5122)]