20051631

素因数分解:

$3^5\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{101}}^1$

素因数の和:178

約数の個数: 48

約数和(自身を含む): 32672640

約数和(自身を除く): 12621009

約数列:

[1, 3, 9, 19, 27, 43, 57, 81, 101, 129, 171, 243, 303, 387, 513, 817, 909, 1161, 1539, 1919, 2451, 2727, 3483, 4343, 4617, 5757, 7353, 8181, 10449, 13029, 17271, 22059, 24543, 39087, 51813, 66177, 82517, 117261, 155439, 198531, 247551, 351783, 466317, 742653, 1055349, 2227959, 6683877, 20051631]

約数ペア:

[(1, 20051631), (3, 6683877), (9, 2227959), (19, 1055349), (27, 742653), (43, 466317), (57, 351783), (81, 247551), (101, 198531), (129, 155439), (171, 117261), (243, 82517), (303, 66177), (387, 51813), (513, 39087), (817, 24543), (909, 22059), (1161, 17271), (1539, 13029), (1919, 10449), (2451, 8181), (2727, 7353), (3483, 5757), (4343, 4617)]