21369663

素因数分解:

$3^5\times 7^1\times {\mathrm{17}}^1\times {\mathrm{739}}^1$

素因数の和:778

約数の個数: 48

約数和(自身を含む): 38787840

約数和(自身を除く): 17418177

約数列:

[1, 3, 7, 9, 17, 21, 27, 51, 63, 81, 119, 153, 189, 243, 357, 459, 567, 739, 1071, 1377, 1701, 2217, 3213, 4131, 5173, 6651, 9639, 12563, 15519, 19953, 28917, 37689, 46557, 59859, 87941, 113067, 139671, 179577, 263823, 339201, 419013, 791469, 1017603, 1257039, 2374407, 3052809, 7123221, 21369663]

約数ペア:

[(1, 21369663), (3, 7123221), (7, 3052809), (9, 2374407), (17, 1257039), (21, 1017603), (27, 791469), (51, 419013), (63, 339201), (81, 263823), (119, 179577), (153, 139671), (189, 113067), (243, 87941), (357, 59859), (459, 46557), (567, 37689), (739, 28917), (1071, 19953), (1377, 15519), (1701, 12563), (2217, 9639), (3213, 6651), (4131, 5173)]