81049780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{19963}}^1$

素因数の和:20008

約数の個数: 48

約数和(自身を含む): 201237120

約数和(自身を除く): 120187340

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 58, 70, 116, 140, 145, 203, 290, 406, 580, 812, 1015, 2030, 4060, 19963, 39926, 79852, 99815, 139741, 199630, 279482, 399260, 558964, 578927, 698705, 1157854, 1397410, 2315708, 2794820, 2894635, 4052489, 5789270, 8104978, 11578540, 16209956, 20262445, 40524890, 81049780]

約数ペア:

[(1, 81049780), (2, 40524890), (4, 20262445), (5, 16209956), (7, 11578540), (10, 8104978), (14, 5789270), (20, 4052489), (28, 2894635), (29, 2794820), (35, 2315708), (58, 1397410), (70, 1157854), (116, 698705), (140, 578927), (145, 558964), (203, 399260), (290, 279482), (406, 199630), (580, 139741), (812, 99815), (1015, 79852), (2030, 39926), (4060, 19963)]