21243292

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{547}}^1$

素因数の和:650

約数の個数: 48

約数和(自身を含む): 45418240

約数和(自身を除く): 24174948

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 73, 76, 133, 146, 266, 292, 511, 532, 547, 1022, 1094, 1387, 2044, 2188, 2774, 3829, 5548, 7658, 9709, 10393, 15316, 19418, 20786, 38836, 39931, 41572, 72751, 79862, 145502, 159724, 279517, 291004, 559034, 758689, 1118068, 1517378, 3034756, 5310823, 10621646, 21243292]

約数ペア:

[(1, 21243292), (2, 10621646), (4, 5310823), (7, 3034756), (14, 1517378), (19, 1118068), (28, 758689), (38, 559034), (73, 291004), (76, 279517), (133, 159724), (146, 145502), (266, 79862), (292, 72751), (511, 41572), (532, 39931), (547, 38836), (1022, 20786), (1094, 19418), (1387, 15316), (2044, 10393), (2188, 9709), (2774, 7658), (3829, 5548)]