21615111

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{101}}^1$

素因数の和:236

約数の個数: 48

約数和(自身を含む): 37340160

約数和(自身を除く): 15725049

約数列:

[1, 3, 7, 9, 21, 43, 63, 79, 101, 129, 237, 301, 303, 387, 553, 707, 711, 903, 909, 1659, 2121, 2709, 3397, 4343, 4977, 6363, 7979, 10191, 13029, 23779, 23937, 30401, 30573, 39087, 55853, 71337, 71811, 91203, 167559, 214011, 273609, 343097, 502677, 1029291, 2401679, 3087873, 7205037, 21615111]

約数ペア:

[(1, 21615111), (3, 7205037), (7, 3087873), (9, 2401679), (21, 1029291), (43, 502677), (63, 343097), (79, 273609), (101, 214011), (129, 167559), (237, 91203), (301, 71811), (303, 71337), (387, 55853), (553, 39087), (707, 30573), (711, 30401), (903, 23937), (909, 23779), (1659, 13029), (2121, 10191), (2709, 7979), (3397, 6363), (4343, 4977)]