20506857

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{151}}^1\times {\mathrm{223}}^1$

素因数の和:413

約数の個数: 32

約数和(自身を含む): 32686080

約数和(自身を除く): 12179223

約数列:

[1, 3, 7, 21, 29, 87, 151, 203, 223, 453, 609, 669, 1057, 1561, 3171, 4379, 4683, 6467, 13137, 19401, 30653, 33673, 45269, 91959, 101019, 135807, 235711, 707133, 976517, 2929551, 6835619, 20506857]

約数ペア:

[(1, 20506857), (3, 6835619), (7, 2929551), (21, 976517), (29, 707133), (87, 235711), (151, 135807), (203, 101019), (223, 91959), (453, 45269), (609, 33673), (669, 30653), (1057, 19401), (1561, 13137), (3171, 6467), (4379, 4683)]