21879315

素因数分解:

$3^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{607}}^1$

素因数の和:713

約数の個数: 40

約数和(自身を含む): 39726720

約数和(自身を除く): 17847405

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 89, 135, 267, 405, 445, 607, 801, 1335, 1821, 2403, 3035, 4005, 5463, 7209, 9105, 12015, 16389, 27315, 36045, 49167, 54023, 81945, 162069, 245835, 270115, 486207, 810345, 1458621, 2431035, 4375863, 7293105, 21879315]

約数ペア:

[(1, 21879315), (3, 7293105), (5, 4375863), (9, 2431035), (15, 1458621), (27, 810345), (45, 486207), (81, 270115), (89, 245835), (135, 162069), (267, 81945), (405, 54023), (445, 49167), (607, 36045), (801, 27315), (1335, 16389), (1821, 12015), (2403, 9105), (3035, 7209), (4005, 5463)]