18979023

素因数分解:

$3^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{67}}^1$

素因数の和:172

約数の個数: 48

約数和(自身を含む): 31256064

約数和(自身を除く): 12277041

約数列:

[1, 3, 7, 21, 41, 47, 49, 67, 123, 141, 147, 201, 287, 329, 469, 861, 987, 1407, 1927, 2009, 2303, 2747, 3149, 3283, 5781, 6027, 6909, 8241, 9447, 9849, 13489, 19229, 22043, 40467, 57687, 66129, 94423, 129109, 134603, 154301, 283269, 387327, 403809, 462903, 903763, 2711289, 6326341, 18979023]

約数ペア:

[(1, 18979023), (3, 6326341), (7, 2711289), (21, 903763), (41, 462903), (47, 403809), (49, 387327), (67, 283269), (123, 154301), (141, 134603), (147, 129109), (201, 94423), (287, 66129), (329, 57687), (469, 40467), (861, 22043), (987, 19229), (1407, 13489), (1927, 9849), (2009, 9447), (2303, 8241), (2747, 6909), (3149, 6027), (3283, 5781)]