20787507

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{79}}^1\times {\mathrm{173}}^1$

素因数の和:284

約数の個数: 36

約数和(自身を含む): 33115680

約数和(自身を除く): 12328173

約数列:

[1, 3, 9, 13, 39, 79, 117, 169, 173, 237, 507, 519, 711, 1027, 1521, 1557, 2249, 3081, 6747, 9243, 13351, 13667, 20241, 29237, 40053, 41001, 87711, 120159, 123003, 177671, 263133, 533013, 1599039, 2309723, 6929169, 20787507]

約数ペア:

[(1, 20787507), (3, 6929169), (9, 2309723), (13, 1599039), (39, 533013), (79, 263133), (117, 177671), (169, 123003), (173, 120159), (237, 87711), (507, 41001), (519, 40053), (711, 29237), (1027, 20241), (1521, 13667), (1557, 13351), (2249, 9243), (3081, 6747)]