21315693

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{137}}^1\times {\mathrm{239}}^1$

素因数の和:417

約数の個数: 32

約数和(自身を含む): 33914880

約数和(自身を除く): 12599187

約数列:

[1, 3, 7, 21, 31, 93, 137, 217, 239, 411, 651, 717, 959, 1673, 2877, 4247, 5019, 7409, 12741, 22227, 29729, 32743, 51863, 89187, 98229, 155589, 229201, 687603, 1015033, 3045099, 7105231, 21315693]

約数ペア:

[(1, 21315693), (3, 7105231), (7, 3045099), (21, 1015033), (31, 687603), (93, 229201), (137, 155589), (217, 98229), (239, 89187), (411, 51863), (651, 32743), (717, 29729), (959, 22227), (1673, 12741), (2877, 7409), (4247, 5019)]