21416031

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{331}}^1$

素因数の和:436

約数の個数: 48

約数和(自身を含む): 38671360

約数和(自身を除く): 17255329

約数列:

[1, 3, 7, 9, 13, 21, 39, 63, 79, 91, 117, 237, 273, 331, 553, 711, 819, 993, 1027, 1659, 2317, 2979, 3081, 4303, 4977, 6951, 7189, 9243, 12909, 20853, 21567, 26149, 30121, 38727, 64701, 78447, 90363, 183043, 235341, 271089, 339937, 549129, 1019811, 1647387, 2379559, 3059433, 7138677, 21416031]

約数ペア:

[(1, 21416031), (3, 7138677), (7, 3059433), (9, 2379559), (13, 1647387), (21, 1019811), (39, 549129), (63, 339937), (79, 271089), (91, 235341), (117, 183043), (237, 90363), (273, 78447), (331, 64701), (553, 38727), (711, 30121), (819, 26149), (993, 21567), (1027, 20853), (1659, 12909), (2317, 9243), (2979, 7189), (3081, 6951), (4303, 4977)]