19428220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{1901}}^1$

素因数の和:1990

約数の個数: 48

約数和(自身を含む): 47291328

約数和(自身を除く): 27863108

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 73, 140, 146, 292, 365, 511, 730, 1022, 1460, 1901, 2044, 2555, 3802, 5110, 7604, 9505, 10220, 13307, 19010, 26614, 38020, 53228, 66535, 133070, 138773, 266140, 277546, 555092, 693865, 971411, 1387730, 1942822, 2775460, 3885644, 4857055, 9714110, 19428220]

約数ペア:

[(1, 19428220), (2, 9714110), (4, 4857055), (5, 3885644), (7, 2775460), (10, 1942822), (14, 1387730), (20, 971411), (28, 693865), (35, 555092), (70, 277546), (73, 266140), (140, 138773), (146, 133070), (292, 66535), (365, 53228), (511, 38020), (730, 26614), (1022, 19010), (1460, 13307), (1901, 10220), (2044, 9505), (2555, 7604), (3802, 5110)]