20981955

素因数分解:

$3^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{109}}^1\times {\mathrm{313}}^1$

素因数の和:471

約数の個数: 32

約数和(自身を含む): 34816320

約数和(自身を除く): 13834365

約数列:

[1, 3, 5, 15, 41, 109, 123, 205, 313, 327, 545, 615, 939, 1565, 1635, 4469, 4695, 12833, 13407, 22345, 34117, 38499, 64165, 67035, 102351, 170585, 192495, 511755, 1398797, 4196391, 6993985, 20981955]

約数ペア:

[(1, 20981955), (3, 6993985), (5, 4196391), (15, 1398797), (41, 511755), (109, 192495), (123, 170585), (205, 102351), (313, 67035), (327, 64165), (545, 38499), (615, 34117), (939, 22345), (1565, 13407), (1635, 12833), (4469, 4695)]