20881455

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{2801}}^1$

素因数の和:2887

約数の個数: 32

約数和(自身を含む): 38734848

約数和(自身を除く): 17853393

約数列:

[1, 3, 5, 7, 15, 21, 35, 71, 105, 213, 355, 497, 1065, 1491, 2485, 2801, 7455, 8403, 14005, 19607, 42015, 58821, 98035, 198871, 294105, 596613, 994355, 1392097, 2983065, 4176291, 6960485, 20881455]

約数ペア:

[(1, 20881455), (3, 6960485), (5, 4176291), (7, 2983065), (15, 1392097), (21, 994355), (35, 596613), (71, 294105), (105, 198871), (213, 98035), (355, 58821), (497, 42015), (1065, 19607), (1491, 14005), (2485, 8403), (2801, 7455)]