20575215

素因数分解:

$3^4\times 5^1\times {\mathrm{101}}^1\times {\mathrm{503}}^1$

素因数の和:621

約数の個数: 40

約数和(自身を含む): 37322208

約数和(自身を除く): 16746993

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 101, 135, 303, 405, 503, 505, 909, 1509, 1515, 2515, 2727, 4527, 4545, 7545, 8181, 13581, 13635, 22635, 40743, 40905, 50803, 67905, 152409, 203715, 254015, 457227, 762045, 1371681, 2286135, 4115043, 6858405, 20575215]

約数ペア:

[(1, 20575215), (3, 6858405), (5, 4115043), (9, 2286135), (15, 1371681), (27, 762045), (45, 457227), (81, 254015), (101, 203715), (135, 152409), (303, 67905), (405, 50803), (503, 40905), (505, 40743), (909, 22635), (1509, 13635), (1515, 13581), (2515, 8181), (2727, 7545), (4527, 4545)]