21505190

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{4327}}^1$

素因数の和:4412

約数の個数: 32

約数和(自身を含む): 44872704

約数和(自身を除く): 23367514

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 71, 142, 355, 497, 710, 994, 2485, 4327, 4970, 8654, 21635, 30289, 43270, 60578, 151445, 302890, 307217, 614434, 1536085, 2150519, 3072170, 4301038, 10752595, 21505190]

約数ペア:

[(1, 21505190), (2, 10752595), (5, 4301038), (7, 3072170), (10, 2150519), (14, 1536085), (35, 614434), (70, 307217), (71, 302890), (142, 151445), (355, 60578), (497, 43270), (710, 30289), (994, 21635), (2485, 8654), (4327, 4970)]