21438039

素因数分解:

$3^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{3557}}^1$

素因数の和:3615

約数の個数: 24

約数和(自身を含む): 34071408

約数和(自身を除く): 12633369

約数列:

[1, 3, 7, 21, 41, 49, 123, 147, 287, 861, 2009, 3557, 6027, 10671, 24899, 74697, 145837, 174293, 437511, 522879, 1020859, 3062577, 7146013, 21438039]

約数ペア:

[(1, 21438039), (3, 7146013), (7, 3062577), (21, 1020859), (41, 522879), (49, 437511), (123, 174293), (147, 145837), (287, 74697), (861, 24899), (2009, 10671), (3557, 6027)]