21439515

素因数分解:

$3^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{491}}^1$

素因数の和:611

約数の個数: 32

約数和(自身を含む): 35707392

約数和(自身を除く): 14267877

約数列:

[1, 3, 5, 15, 41, 71, 123, 205, 213, 355, 491, 615, 1065, 1473, 2455, 2911, 7365, 8733, 14555, 20131, 34861, 43665, 60393, 100655, 104583, 174305, 301965, 522915, 1429301, 4287903, 7146505, 21439515]

約数ペア:

[(1, 21439515), (3, 7146505), (5, 4287903), (15, 1429301), (41, 522915), (71, 301965), (123, 174305), (205, 104583), (213, 100655), (355, 60393), (491, 43665), (615, 34861), (1065, 20131), (1473, 14555), (2455, 8733), (2911, 7365)]