21605264

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{1013}}^1$

素因数の和:1095

約数の個数: 40

約数和(自身を含む): 44259072

約数和(自身を除く): 22653808

約数列:

[1, 2, 4, 8, 16, 31, 43, 62, 86, 124, 172, 248, 344, 496, 688, 1013, 1333, 2026, 2666, 4052, 5332, 8104, 10664, 16208, 21328, 31403, 43559, 62806, 87118, 125612, 174236, 251224, 348472, 502448, 696944, 1350329, 2700658, 5401316, 10802632, 21605264]

約数ペア:

[(1, 21605264), (2, 10802632), (4, 5401316), (8, 2700658), (16, 1350329), (31, 696944), (43, 502448), (62, 348472), (86, 251224), (124, 174236), (172, 125612), (248, 87118), (344, 62806), (496, 43559), (688, 31403), (1013, 21328), (1333, 16208), (2026, 10664), (2666, 8104), (4052, 5332)]