21996555

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{12323}}^1$

素因数の和:12355

約数の個数: 32

約数和(自身を含む): 42591744

約数和(自身を除く): 20595189

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 51, 85, 105, 119, 255, 357, 595, 1785, 12323, 36969, 61615, 86261, 184845, 209491, 258783, 431305, 628473, 1047455, 1293915, 1466437, 3142365, 4399311, 7332185, 21996555]

約数ペア:

[(1, 21996555), (3, 7332185), (5, 4399311), (7, 3142365), (15, 1466437), (17, 1293915), (21, 1047455), (35, 628473), (51, 431305), (85, 258783), (105, 209491), (119, 184845), (255, 86261), (357, 61615), (595, 36969), (1785, 12323)]