21236810

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{4273}}^1$

素因数の和:4358

約数の個数: 32

約数和(自身を含む): 44312832

約数和(自身を除く): 23076022

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 71, 142, 355, 497, 710, 994, 2485, 4273, 4970, 8546, 21365, 29911, 42730, 59822, 149555, 299110, 303383, 606766, 1516915, 2123681, 3033830, 4247362, 10618405, 21236810]

約数ペア:

[(1, 21236810), (2, 10618405), (5, 4247362), (7, 3033830), (10, 2123681), (14, 1516915), (35, 606766), (70, 303383), (71, 299110), (142, 149555), (355, 59822), (497, 42730), (710, 29911), (994, 21365), (2485, 8546), (4273, 4970)]