21480179

素因数分解:

$7^2\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{179}}^1$

素因数の和:303

約数の個数: 24

約数和(自身を含む): 26265600

約数和(自身を除く): 4785421

約数列:

[1, 7, 31, 49, 79, 179, 217, 553, 1253, 1519, 2449, 3871, 5549, 8771, 14141, 17143, 38843, 98987, 120001, 271901, 438371, 692909, 3068597, 21480179]

約数ペア:

[(1, 21480179), (7, 3068597), (31, 692909), (49, 438371), (79, 271901), (179, 120001), (217, 98987), (553, 38843), (1253, 17143), (1519, 14141), (2449, 8771), (3871, 5549)]