21781680

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{1931}}^1$

素因数の和:1994

約数の個数: 80

約数和(自身を含む): 68995584

約数和(自身を除く): 47213904

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 47, 48, 60, 80, 94, 120, 141, 188, 235, 240, 282, 376, 470, 564, 705, 752, 940, 1128, 1410, 1880, 1931, 2256, 2820, 3760, 3862, 5640, 5793, 7724, 9655, 11280, 11586, 15448, 19310, 23172, 28965, 30896, 38620, 46344, 57930, 77240, 90757, 92688, 115860, 154480, 181514, 231720, 272271, 363028, 453785, 463440, 544542, 726056, 907570, 1089084, 1361355, 1452112, 1815140, 2178168, 2722710, 3630280, 4356336, 5445420, 7260560, 10890840, 21781680]

約数ペア:

[(1, 21781680), (2, 10890840), (3, 7260560), (4, 5445420), (5, 4356336), (6, 3630280), (8, 2722710), (10, 2178168), (12, 1815140), (15, 1452112), (16, 1361355), (20, 1089084), (24, 907570), (30, 726056), (40, 544542), (47, 463440), (48, 453785), (60, 363028), (80, 272271), (94, 231720), (120, 181514), (141, 154480), (188, 115860), (235, 92688), (240, 90757), (282, 77240), (376, 57930), (470, 46344), (564, 38620), (705, 30896), (752, 28965), (940, 23172), (1128, 19310), (1410, 15448), (1880, 11586), (1931, 11280), (2256, 9655), (2820, 7724), (3760, 5793), (3862, 5640)]