20211975

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{313}}^1$

素因数の和:377

約数の個数: 72

約数和(自身を含む): 42518112

約数和(自身を除く): 22306137

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 41, 45, 63, 75, 105, 123, 175, 205, 225, 287, 313, 315, 369, 525, 615, 861, 939, 1025, 1435, 1565, 1575, 1845, 2191, 2583, 2817, 3075, 4305, 4695, 6573, 7175, 7825, 9225, 10955, 12833, 12915, 14085, 19719, 21525, 23475, 32865, 38499, 54775, 64165, 64575, 70425, 89831, 98595, 115497, 164325, 192495, 269493, 320825, 449155, 492975, 577485, 808479, 962475, 1347465, 2245775, 2887425, 4042395, 6737325, 20211975]

約数ペア:

[(1, 20211975), (3, 6737325), (5, 4042395), (7, 2887425), (9, 2245775), (15, 1347465), (21, 962475), (25, 808479), (35, 577485), (41, 492975), (45, 449155), (63, 320825), (75, 269493), (105, 192495), (123, 164325), (175, 115497), (205, 98595), (225, 89831), (287, 70425), (313, 64575), (315, 64165), (369, 54775), (525, 38499), (615, 32865), (861, 23475), (939, 21525), (1025, 19719), (1435, 14085), (1565, 12915), (1575, 12833), (1845, 10955), (2191, 9225), (2583, 7825), (2817, 7175), (3075, 6573), (4305, 4695)]