21154312

素因数分解:

$2^3\times {\mathrm{61}}^1\times {\mathrm{67}}^1\times {\mathrm{647}}^1$

素因数の和:781

約数の個数: 32

約数和(自身を含む): 40979520

約数和(自身を除く): 19825208

約数列:

[1, 2, 4, 8, 61, 67, 122, 134, 244, 268, 488, 536, 647, 1294, 2588, 4087, 5176, 8174, 16348, 32696, 39467, 43349, 78934, 86698, 157868, 173396, 315736, 346792, 2644289, 5288578, 10577156, 21154312]

約数ペア:

[(1, 21154312), (2, 10577156), (4, 5288578), (8, 2644289), (61, 346792), (67, 315736), (122, 173396), (134, 157868), (244, 86698), (268, 78934), (488, 43349), (536, 39467), (647, 32696), (1294, 16348), (2588, 8174), (4087, 5176)]