21959119

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{157}}^1$

素因数の和:259

約数の個数: 32

約数和(自身を含む): 28667520

約数和(自身を除く): 6708401

約数列:

[1, 7, 13, 29, 53, 91, 157, 203, 371, 377, 689, 1099, 1537, 2041, 2639, 4553, 4823, 8321, 10759, 14287, 19981, 31871, 58247, 59189, 108173, 139867, 241309, 414323, 757211, 1689163, 3137017, 21959119]

約数ペア:

[(1, 21959119), (7, 3137017), (13, 1689163), (29, 757211), (53, 414323), (91, 241309), (157, 139867), (203, 108173), (371, 59189), (377, 58247), (689, 31871), (1099, 19981), (1537, 14287), (2041, 10759), (2639, 8321), (4553, 4823)]