21371840

素因数分解:

$2^6\times 5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{47}}^1$

素因数の和:107

約数の個数: 168

約数和(自身を含む): 62544960

約数和(自身を除く): 41173120

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 29, 32, 35, 40, 47, 49, 56, 58, 64, 70, 80, 94, 98, 112, 116, 140, 145, 160, 188, 196, 203, 224, 232, 235, 245, 280, 290, 320, 329, 376, 392, 406, 448, 464, 470, 490, 560, 580, 658, 752, 784, 812, 928, 940, 980, 1015, 1120, 1160, 1316, 1363, 1421, 1504, 1568, 1624, 1645, 1856, 1880, 1960, 2030, 2240, 2303, 2320, 2632, 2726, 2842, 3008, 3136, 3248, 3290, 3760, 3920, 4060, 4606, 4640, 5264, 5452, 5684, 6496, 6580, 6815, 7105, 7520, 7840, 8120, 9212, 9280, 9541, 10528, 10904, 11368, 11515, 12992, 13160, 13630, 14210, 15040, 15680, 16240, 18424, 19082, 21056, 21808, 22736, 23030, 26320, 27260, 28420, 32480, 36848, 38164, 43616, 45472, 46060, 47705, 52640, 54520, 56840, 64960, 66787, 73696, 76328, 87232, 90944, 92120, 95410, 105280, 109040, 113680, 133574, 147392, 152656, 184240, 190820, 218080, 227360, 267148, 305312, 333935, 368480, 381640, 436160, 454720, 534296, 610624, 667870, 736960, 763280, 1068592, 1335740, 1526560, 2137184, 2671480, 3053120, 4274368, 5342960, 10685920, 21371840]

約数ペア:

[(1, 21371840), (2, 10685920), (4, 5342960), (5, 4274368), (7, 3053120), (8, 2671480), (10, 2137184), (14, 1526560), (16, 1335740), (20, 1068592), (28, 763280), (29, 736960), (32, 667870), (35, 610624), (40, 534296), (47, 454720), (49, 436160), (56, 381640), (58, 368480), (64, 333935), (70, 305312), (80, 267148), (94, 227360), (98, 218080), (112, 190820), (116, 184240), (140, 152656), (145, 147392), (160, 133574), (188, 113680), (196, 109040), (203, 105280), (224, 95410), (232, 92120), (235, 90944), (245, 87232), (280, 76328), (290, 73696), (320, 66787), (329, 64960), (376, 56840), (392, 54520), (406, 52640), (448, 47705), (464, 46060), (470, 45472), (490, 43616), (560, 38164), (580, 36848), (658, 32480), (752, 28420), (784, 27260), (812, 26320), (928, 23030), (940, 22736), (980, 21808), (1015, 21056), (1120, 19082), (1160, 18424), (1316, 16240), (1363, 15680), (1421, 15040), (1504, 14210), (1568, 13630), (1624, 13160), (1645, 12992), (1856, 11515), (1880, 11368), (1960, 10904), (2030, 10528), (2240, 9541), (2303, 9280), (2320, 9212), (2632, 8120), (2726, 7840), (2842, 7520), (3008, 7105), (3136, 6815), (3248, 6580), (3290, 6496), (3760, 5684), (3920, 5452), (4060, 5264), (4606, 4640)]