21454065

素因数分解:

$3^4\times 5^1\times {\mathrm{52973}}^1$

素因数の和:52990

約数の個数: 20

約数和(自身を含む): 38459124

約数和(自身を除く): 17005059

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 52973, 158919, 264865, 476757, 794595, 1430271, 2383785, 4290813, 7151355, 21454065]

約数ペア:

[(1, 21454065), (3, 7151355), (5, 4290813), (9, 2383785), (15, 1430271), (27, 794595), (45, 476757), (81, 264865), (135, 158919), (405, 52973)]