21812395

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{401}}^1$

素因数の和:483

約数の個数: 32

約数和(自身を含む): 30564864

約数和(自身を除く): 8752469

約数列:

[1, 5, 11, 23, 43, 55, 115, 215, 253, 401, 473, 989, 1265, 2005, 2365, 4411, 4945, 9223, 10879, 17243, 22055, 46115, 54395, 86215, 101453, 189673, 396589, 507265, 948365, 1982945, 4362479, 21812395]

約数ペア:

[(1, 21812395), (5, 4362479), (11, 1982945), (23, 948365), (43, 507265), (55, 396589), (115, 189673), (215, 101453), (253, 86215), (401, 54395), (473, 46115), (989, 22055), (1265, 17243), (2005, 10879), (2365, 9223), (4411, 4945)]