20819142

素因数分解:

$2^1\times 3^2\times {\mathrm{53}}^1\times {\mathrm{139}}^1\times {\mathrm{157}}^1$

素因数の和:357

約数の個数: 48

約数和(自身を含む): 46584720

約数和(自身を除く): 25765578

約数列:

[1, 2, 3, 6, 9, 18, 53, 106, 139, 157, 159, 278, 314, 318, 417, 471, 477, 834, 942, 954, 1251, 1413, 2502, 2826, 7367, 8321, 14734, 16642, 21823, 22101, 24963, 43646, 44202, 49926, 65469, 66303, 74889, 130938, 132606, 149778, 196407, 392814, 1156619, 2313238, 3469857, 6939714, 10409571, 20819142]

約数ペア:

[(1, 20819142), (2, 10409571), (3, 6939714), (6, 3469857), (9, 2313238), (18, 1156619), (53, 392814), (106, 196407), (139, 149778), (157, 132606), (159, 130938), (278, 74889), (314, 66303), (318, 65469), (417, 49926), (471, 44202), (477, 43646), (834, 24963), (942, 22101), (954, 21823), (1251, 16642), (1413, 14734), (2502, 8321), (2826, 7367)]