20609547

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{157}}^1$

素因数の和:240

約数の個数: 48

約数和(自身を含む): 34583040

約数和(自身を除く): 13973493

約数列:

[1, 3, 7, 19, 21, 47, 49, 57, 133, 141, 147, 157, 329, 399, 471, 893, 931, 987, 1099, 2303, 2679, 2793, 2983, 3297, 6251, 6909, 7379, 7693, 8949, 18753, 20881, 22137, 23079, 43757, 51653, 62643, 131271, 140201, 146167, 154959, 361571, 420603, 438501, 981407, 1084713, 2944221, 6869849, 20609547]

約数ペア:

[(1, 20609547), (3, 6869849), (7, 2944221), (19, 1084713), (21, 981407), (47, 438501), (49, 420603), (57, 361571), (133, 154959), (141, 146167), (147, 140201), (157, 131271), (329, 62643), (399, 51653), (471, 43757), (893, 23079), (931, 22137), (987, 20881), (1099, 18753), (2303, 8949), (2679, 7693), (2793, 7379), (2983, 6909), (3297, 6251)]