21187800

素因数分解:

$2^3\times 3^2\times 5^2\times {\mathrm{79}}^1\times {\mathrm{149}}^1$

素因数の和:250

約数の個数: 144

約数和(自身を含む): 72540000

約数和(自身を除く): 51352200

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 25, 30, 36, 40, 45, 50, 60, 72, 75, 79, 90, 100, 120, 149, 150, 158, 180, 200, 225, 237, 298, 300, 316, 360, 395, 447, 450, 474, 596, 600, 632, 711, 745, 790, 894, 900, 948, 1185, 1192, 1341, 1422, 1490, 1580, 1788, 1800, 1896, 1975, 2235, 2370, 2682, 2844, 2980, 3160, 3555, 3576, 3725, 3950, 4470, 4740, 5364, 5688, 5925, 5960, 6705, 7110, 7450, 7900, 8940, 9480, 10728, 11175, 11771, 11850, 13410, 14220, 14900, 15800, 17775, 17880, 22350, 23542, 23700, 26820, 28440, 29800, 33525, 35313, 35550, 44700, 47084, 47400, 53640, 58855, 67050, 70626, 71100, 89400, 94168, 105939, 117710, 134100, 141252, 142200, 176565, 211878, 235420, 268200, 282504, 294275, 353130, 423756, 470840, 529695, 588550, 706260, 847512, 882825, 1059390, 1177100, 1412520, 1765650, 2118780, 2354200, 2648475, 3531300, 4237560, 5296950, 7062600, 10593900, 21187800]

約数ペア:

[(1, 21187800), (2, 10593900), (3, 7062600), (4, 5296950), (5, 4237560), (6, 3531300), (8, 2648475), (9, 2354200), (10, 2118780), (12, 1765650), (15, 1412520), (18, 1177100), (20, 1059390), (24, 882825), (25, 847512), (30, 706260), (36, 588550), (40, 529695), (45, 470840), (50, 423756), (60, 353130), (72, 294275), (75, 282504), (79, 268200), (90, 235420), (100, 211878), (120, 176565), (149, 142200), (150, 141252), (158, 134100), (180, 117710), (200, 105939), (225, 94168), (237, 89400), (298, 71100), (300, 70626), (316, 67050), (360, 58855), (395, 53640), (447, 47400), (450, 47084), (474, 44700), (596, 35550), (600, 35313), (632, 33525), (711, 29800), (745, 28440), (790, 26820), (894, 23700), (900, 23542), (948, 22350), (1185, 17880), (1192, 17775), (1341, 15800), (1422, 14900), (1490, 14220), (1580, 13410), (1788, 11850), (1800, 11771), (1896, 11175), (1975, 10728), (2235, 9480), (2370, 8940), (2682, 7900), (2844, 7450), (2980, 7110), (3160, 6705), (3555, 5960), (3576, 5925), (3725, 5688), (3950, 5364), (4470, 4740)]