21006495

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{311}}^1$

素因数の和:420

約数の個数: 48

約数和(自身を含む): 38937600

約数和(自身を除く): 17931105

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 79, 95, 171, 237, 285, 311, 395, 711, 855, 933, 1185, 1501, 1555, 2799, 3555, 4503, 4665, 5909, 7505, 13509, 13995, 17727, 22515, 24569, 29545, 53181, 67545, 73707, 88635, 122845, 221121, 265905, 368535, 466811, 1105605, 1400433, 2334055, 4201299, 7002165, 21006495]

約数ペア:

[(1, 21006495), (3, 7002165), (5, 4201299), (9, 2334055), (15, 1400433), (19, 1105605), (45, 466811), (57, 368535), (79, 265905), (95, 221121), (171, 122845), (237, 88635), (285, 73707), (311, 67545), (395, 53181), (711, 29545), (855, 24569), (933, 22515), (1185, 17727), (1501, 13995), (1555, 13509), (2799, 7505), (3555, 5909), (4503, 4665)]