21880980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{257}}^1$

素因数の和:326

約数の個数: 144

約数和(自身を含む): 74378304

約数和(自身を除く): 52497324

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 43, 44, 45, 55, 60, 66, 86, 90, 99, 110, 129, 132, 165, 172, 180, 198, 215, 220, 257, 258, 330, 387, 396, 430, 473, 495, 514, 516, 645, 660, 771, 774, 860, 946, 990, 1028, 1285, 1290, 1419, 1542, 1548, 1892, 1935, 1980, 2313, 2365, 2570, 2580, 2827, 2838, 3084, 3855, 3870, 4257, 4626, 4730, 5140, 5654, 5676, 7095, 7710, 7740, 8481, 8514, 9252, 9460, 11051, 11308, 11565, 14135, 14190, 15420, 16962, 17028, 21285, 22102, 23130, 25443, 28270, 28380, 33153, 33924, 42405, 42570, 44204, 46260, 50886, 55255, 56540, 66306, 84810, 85140, 99459, 101772, 110510, 121561, 127215, 132612, 165765, 169620, 198918, 221020, 243122, 254430, 331530, 364683, 397836, 486244, 497295, 508860, 607805, 663060, 729366, 994590, 1094049, 1215610, 1458732, 1823415, 1989180, 2188098, 2431220, 3646830, 4376196, 5470245, 7293660, 10940490, 21880980]

約数ペア:

[(1, 21880980), (2, 10940490), (3, 7293660), (4, 5470245), (5, 4376196), (6, 3646830), (9, 2431220), (10, 2188098), (11, 1989180), (12, 1823415), (15, 1458732), (18, 1215610), (20, 1094049), (22, 994590), (30, 729366), (33, 663060), (36, 607805), (43, 508860), (44, 497295), (45, 486244), (55, 397836), (60, 364683), (66, 331530), (86, 254430), (90, 243122), (99, 221020), (110, 198918), (129, 169620), (132, 165765), (165, 132612), (172, 127215), (180, 121561), (198, 110510), (215, 101772), (220, 99459), (257, 85140), (258, 84810), (330, 66306), (387, 56540), (396, 55255), (430, 50886), (473, 46260), (495, 44204), (514, 42570), (516, 42405), (645, 33924), (660, 33153), (771, 28380), (774, 28270), (860, 25443), (946, 23130), (990, 22102), (1028, 21285), (1285, 17028), (1290, 16962), (1419, 15420), (1542, 14190), (1548, 14135), (1892, 11565), (1935, 11308), (1980, 11051), (2313, 9460), (2365, 9252), (2570, 8514), (2580, 8481), (2827, 7740), (2838, 7710), (3084, 7095), (3855, 5676), (3870, 5654), (4257, 5140), (4626, 4730)]