21993345

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{157}}^1\times {\mathrm{283}}^1$

素因数の和:462

約数の個数: 48

約数和(自身を含む): 42000192

約数和(自身を除く): 20006847

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 157, 165, 283, 471, 495, 785, 849, 1413, 1415, 1727, 2355, 2547, 3113, 4245, 5181, 7065, 8635, 9339, 12735, 15543, 15565, 25905, 28017, 44431, 46695, 77715, 133293, 140085, 222155, 399879, 488741, 666465, 1466223, 1999395, 2443705, 4398669, 7331115, 21993345]

約数ペア:

[(1, 21993345), (3, 7331115), (5, 4398669), (9, 2443705), (11, 1999395), (15, 1466223), (33, 666465), (45, 488741), (55, 399879), (99, 222155), (157, 140085), (165, 133293), (283, 77715), (471, 46695), (495, 44431), (785, 28017), (849, 25905), (1413, 15565), (1415, 15543), (1727, 12735), (2355, 9339), (2547, 8635), (3113, 7065), (4245, 5181)]