21459664

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{967}}^1$

素因数の和:1067

約数の個数: 40

約数和(自身を含む): 44411840

約数和(自身を除く): 22952176

約数列:

[1, 2, 4, 8, 16, 19, 38, 73, 76, 146, 152, 292, 304, 584, 967, 1168, 1387, 1934, 2774, 3868, 5548, 7736, 11096, 15472, 18373, 22192, 36746, 70591, 73492, 141182, 146984, 282364, 293968, 564728, 1129456, 1341229, 2682458, 5364916, 10729832, 21459664]

約数ペア:

[(1, 21459664), (2, 10729832), (4, 5364916), (8, 2682458), (16, 1341229), (19, 1129456), (38, 564728), (73, 293968), (76, 282364), (146, 146984), (152, 141182), (292, 73492), (304, 70591), (584, 36746), (967, 22192), (1168, 18373), (1387, 15472), (1934, 11096), (2774, 7736), (3868, 5548)]