20401355

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{137}}^1$

素因数の和:263

約数の個数: 32

約数和(自身を含む): 27820800

約数和(自身を除く): 7419445

約数列:

[1, 5, 13, 29, 65, 79, 137, 145, 377, 395, 685, 1027, 1781, 1885, 2291, 3973, 5135, 8905, 10823, 11455, 19865, 29783, 51649, 54115, 140699, 148915, 258245, 313867, 703495, 1569335, 4080271, 20401355]

約数ペア:

[(1, 20401355), (5, 4080271), (13, 1569335), (29, 703495), (65, 313867), (79, 258245), (137, 148915), (145, 140699), (377, 54115), (395, 51649), (685, 29783), (1027, 19865), (1781, 11455), (1885, 10823), (2291, 8905), (3973, 5135)]