21251395

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{73}}^1\times {\mathrm{79}}^1$

素因数の和:235

約数の個数: 32

約数和(自身を含む): 28984320

約数和(自身を除く): 7732925

約数列:

[1, 5, 11, 55, 67, 73, 79, 335, 365, 395, 737, 803, 869, 3685, 4015, 4345, 4891, 5293, 5767, 24455, 26465, 28835, 53801, 58223, 63437, 269005, 291115, 317185, 386389, 1931945, 4250279, 21251395]

約数ペア:

[(1, 21251395), (5, 4250279), (11, 1931945), (55, 386389), (67, 317185), (73, 291115), (79, 269005), (335, 63437), (365, 58223), (395, 53801), (737, 28835), (803, 26465), (869, 24455), (3685, 5767), (4015, 5293), (4345, 4891)]