21191445

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{1381}}^1$

素因数の和:1434

約数の個数: 48

約数和(自身を含む): 41393664

約数和(自身を除く): 20202219

約数列:

[1, 3, 5, 9, 11, 15, 31, 33, 45, 55, 93, 99, 155, 165, 279, 341, 465, 495, 1023, 1381, 1395, 1705, 3069, 4143, 5115, 6905, 12429, 15191, 15345, 20715, 42811, 45573, 62145, 75955, 128433, 136719, 214055, 227865, 385299, 470921, 642165, 683595, 1412763, 1926495, 2354605, 4238289, 7063815, 21191445]

約数ペア:

[(1, 21191445), (3, 7063815), (5, 4238289), (9, 2354605), (11, 1926495), (15, 1412763), (31, 683595), (33, 642165), (45, 470921), (55, 385299), (93, 227865), (99, 214055), (155, 136719), (165, 128433), (279, 75955), (341, 62145), (465, 45573), (495, 42811), (1023, 20715), (1381, 15345), (1395, 15191), (1705, 12429), (3069, 6905), (4143, 5115)]