20778896

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{967}}^1$

素因数の和:1071

約数の個数: 40

約数和(自身を含む): 43211520

約数和(自身を除く): 22432624

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 79, 136, 158, 272, 316, 632, 967, 1264, 1343, 1934, 2686, 3868, 5372, 7736, 10744, 15472, 16439, 21488, 32878, 65756, 76393, 131512, 152786, 263024, 305572, 611144, 1222288, 1298681, 2597362, 5194724, 10389448, 20778896]

約数ペア:

[(1, 20778896), (2, 10389448), (4, 5194724), (8, 2597362), (16, 1298681), (17, 1222288), (34, 611144), (68, 305572), (79, 263024), (136, 152786), (158, 131512), (272, 76393), (316, 65756), (632, 32878), (967, 21488), (1264, 16439), (1343, 15472), (1934, 10744), (2686, 7736), (3868, 5372)]