21308189

素因数分解:

$7^3\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1$

素因数の和:154

約数の個数: 32

約数和(自身を含む): 26995200

約数和(自身を除く): 5687011

約数列:

[1, 7, 23, 37, 49, 73, 161, 259, 343, 511, 851, 1127, 1679, 1813, 2701, 3577, 5957, 7889, 11753, 12691, 18907, 25039, 41699, 62123, 82271, 132349, 291893, 434861, 575897, 926443, 3044027, 21308189]

約数ペア:

[(1, 21308189), (7, 3044027), (23, 926443), (37, 575897), (49, 434861), (73, 291893), (161, 132349), (259, 82271), (343, 62123), (511, 41699), (851, 25039), (1127, 18907), (1679, 12691), (1813, 11753), (2701, 7889), (3577, 5957)]