21259936

素因数分解:

$2^5\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{479}}^1$

素因数の和:581

約数の個数: 48

約数和(自身を含む): 44755200

約数和(自身を除く): 23495264

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 73, 76, 146, 152, 292, 304, 479, 584, 608, 958, 1168, 1387, 1916, 2336, 2774, 3832, 5548, 7664, 9101, 11096, 15328, 18202, 22192, 34967, 36404, 44384, 69934, 72808, 139868, 145616, 279736, 291232, 559472, 664373, 1118944, 1328746, 2657492, 5314984, 10629968, 21259936]

約数ペア:

[(1, 21259936), (2, 10629968), (4, 5314984), (8, 2657492), (16, 1328746), (19, 1118944), (32, 664373), (38, 559472), (73, 291232), (76, 279736), (146, 145616), (152, 139868), (292, 72808), (304, 69934), (479, 44384), (584, 36404), (608, 34967), (958, 22192), (1168, 18202), (1387, 15328), (1916, 11096), (2336, 9101), (2774, 7664), (3832, 5548)]