19936400

素因数分解:

$2^4\times 5^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{197}}^1$

素因数の和:249

約数の個数: 120

約数和(自身を含む): 54800064

約数和(自身を除く): 34863664

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 23, 25, 40, 44, 46, 50, 55, 80, 88, 92, 100, 110, 115, 176, 184, 197, 200, 220, 230, 253, 275, 368, 394, 400, 440, 460, 506, 550, 575, 788, 880, 920, 985, 1012, 1100, 1150, 1265, 1576, 1840, 1970, 2024, 2167, 2200, 2300, 2530, 3152, 3940, 4048, 4334, 4400, 4531, 4600, 4925, 5060, 6325, 7880, 8668, 9062, 9200, 9850, 10120, 10835, 12650, 15760, 17336, 18124, 19700, 20240, 21670, 22655, 25300, 34672, 36248, 39400, 43340, 45310, 49841, 50600, 54175, 72496, 78800, 86680, 90620, 99682, 101200, 108350, 113275, 173360, 181240, 199364, 216700, 226550, 249205, 362480, 398728, 433400, 453100, 498410, 797456, 866800, 906200, 996820, 1246025, 1812400, 1993640, 2492050, 3987280, 4984100, 9968200, 19936400]

約数ペア:

[(1, 19936400), (2, 9968200), (4, 4984100), (5, 3987280), (8, 2492050), (10, 1993640), (11, 1812400), (16, 1246025), (20, 996820), (22, 906200), (23, 866800), (25, 797456), (40, 498410), (44, 453100), (46, 433400), (50, 398728), (55, 362480), (80, 249205), (88, 226550), (92, 216700), (100, 199364), (110, 181240), (115, 173360), (176, 113275), (184, 108350), (197, 101200), (200, 99682), (220, 90620), (230, 86680), (253, 78800), (275, 72496), (368, 54175), (394, 50600), (400, 49841), (440, 45310), (460, 43340), (506, 39400), (550, 36248), (575, 34672), (788, 25300), (880, 22655), (920, 21670), (985, 20240), (1012, 19700), (1100, 18124), (1150, 17336), (1265, 15760), (1576, 12650), (1840, 10835), (1970, 10120), (2024, 9850), (2167, 9200), (2200, 9062), (2300, 8668), (2530, 7880), (3152, 6325), (3940, 5060), (4048, 4925), (4334, 4600), (4400, 4531)]