19780695

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{449}}^1$

素因数の和:560

約数の個数: 48

約数和(自身を含む): 37908000

約数和(自身を除く): 18127305

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 89, 99, 165, 267, 445, 449, 495, 801, 979, 1335, 1347, 2245, 2937, 4005, 4041, 4895, 4939, 6735, 8811, 14685, 14817, 20205, 24695, 39961, 44055, 44451, 74085, 119883, 199805, 222255, 359649, 439571, 599415, 1318713, 1798245, 2197855, 3956139, 6593565, 19780695]

約数ペア:

[(1, 19780695), (3, 6593565), (5, 3956139), (9, 2197855), (11, 1798245), (15, 1318713), (33, 599415), (45, 439571), (55, 359649), (89, 222255), (99, 199805), (165, 119883), (267, 74085), (445, 44451), (449, 44055), (495, 39961), (801, 24695), (979, 20205), (1335, 14817), (1347, 14685), (2245, 8811), (2937, 6735), (4005, 4939), (4041, 4895)]