81021890

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{211}}^1$

素因数の和:327

約数の個数: 64

約数和(自身を含む): 161187840

約数和(自身を除く): 80165950

約数列:

[1, 2, 5, 10, 19, 38, 43, 47, 86, 94, 95, 190, 211, 215, 235, 422, 430, 470, 817, 893, 1055, 1634, 1786, 2021, 2110, 4009, 4042, 4085, 4465, 8018, 8170, 8930, 9073, 9917, 10105, 18146, 19834, 20045, 20210, 38399, 40090, 45365, 49585, 76798, 90730, 99170, 172387, 188423, 191995, 344774, 376846, 383990, 426431, 852862, 861935, 942115, 1723870, 1884230, 2132155, 4264310, 8102189, 16204378, 40510945, 81021890]

約数ペア:

[(1, 81021890), (2, 40510945), (5, 16204378), (10, 8102189), (19, 4264310), (38, 2132155), (43, 1884230), (47, 1723870), (86, 942115), (94, 861935), (95, 852862), (190, 426431), (211, 383990), (215, 376846), (235, 344774), (422, 191995), (430, 188423), (470, 172387), (817, 99170), (893, 90730), (1055, 76798), (1634, 49585), (1786, 45365), (2021, 40090), (2110, 38399), (4009, 20210), (4042, 20045), (4085, 19834), (4465, 18146), (8018, 10105), (8170, 9917), (8930, 9073)]