19821921

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{151}}^1$

素因数の和:234

約数の個数: 48

約数和(自身を含む): 33269760

約数和(自身を除く): 13447839

約数列:

[1, 3, 7, 19, 21, 47, 49, 57, 133, 141, 147, 151, 329, 399, 453, 893, 931, 987, 1057, 2303, 2679, 2793, 2869, 3171, 6251, 6909, 7097, 7399, 8607, 18753, 20083, 21291, 22197, 43757, 49679, 60249, 131271, 134843, 140581, 149037, 347753, 404529, 421743, 943901, 1043259, 2831703, 6607307, 19821921]

約数ペア:

[(1, 19821921), (3, 6607307), (7, 2831703), (19, 1043259), (21, 943901), (47, 421743), (49, 404529), (57, 347753), (133, 149037), (141, 140581), (147, 134843), (151, 131271), (329, 60249), (399, 49679), (453, 43757), (893, 22197), (931, 21291), (987, 20083), (1057, 18753), (2303, 8607), (2679, 7399), (2793, 7097), (2869, 6909), (3171, 6251)]