20123781355

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{137}}^1\times {\mathrm{16607}}^1$

素因数の和:16839

約数の個数: 32

約数和(自身を含む): 25577648640

約数和(自身を除く): 5453867285

約数列:

[1, 5, 29, 61, 137, 145, 305, 685, 1769, 3973, 8357, 8845, 16607, 19865, 41785, 83035, 242353, 481603, 1013027, 1211765, 2275159, 2408015, 5065135, 11375795, 29377783, 65979611, 138784699, 146888915, 329898055, 693923495, 4024756271, 20123781355]

約数ペア:

[(1, 20123781355), (5, 4024756271), (29, 693923495), (61, 329898055), (137, 146888915), (145, 138784699), (305, 65979611), (685, 29377783), (1769, 11375795), (3973, 5065135), (8357, 2408015), (8845, 2275159), (16607, 1211765), (19865, 1013027), (41785, 481603), (83035, 242353)]