21606795

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{239}}^1$

素因数の和:305

約数の個数: 72

約数和(自身を含む): 44815680

約数和(自身を除く): 23208885

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 41, 45, 49, 63, 105, 123, 147, 205, 239, 245, 287, 315, 369, 441, 615, 717, 735, 861, 1195, 1435, 1673, 1845, 2009, 2151, 2205, 2583, 3585, 4305, 5019, 6027, 8365, 9799, 10045, 10755, 11711, 12915, 15057, 18081, 25095, 29397, 30135, 35133, 48995, 58555, 68593, 75285, 88191, 90405, 105399, 146985, 175665, 205779, 342965, 440955, 480151, 526995, 617337, 1028895, 1440453, 2400755, 3086685, 4321359, 7202265, 21606795]

約数ペア:

[(1, 21606795), (3, 7202265), (5, 4321359), (7, 3086685), (9, 2400755), (15, 1440453), (21, 1028895), (35, 617337), (41, 526995), (45, 480151), (49, 440955), (63, 342965), (105, 205779), (123, 175665), (147, 146985), (205, 105399), (239, 90405), (245, 88191), (287, 75285), (315, 68593), (369, 58555), (441, 48995), (615, 35133), (717, 30135), (735, 29397), (861, 25095), (1195, 18081), (1435, 15057), (1673, 12915), (1845, 11711), (2009, 10755), (2151, 10045), (2205, 9799), (2583, 8365), (3585, 6027), (4305, 5019)]