20768900

素因数分解:

$2^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{643}}^1$

素因数の和:693

約数の個数: 72

約数和(自身を含む): 50309280

約数和(自身を除く): 29540380

約数列:

[1, 2, 4, 5, 10, 17, 19, 20, 25, 34, 38, 50, 68, 76, 85, 95, 100, 170, 190, 323, 340, 380, 425, 475, 643, 646, 850, 950, 1286, 1292, 1615, 1700, 1900, 2572, 3215, 3230, 6430, 6460, 8075, 10931, 12217, 12860, 16075, 16150, 21862, 24434, 32150, 32300, 43724, 48868, 54655, 61085, 64300, 109310, 122170, 207689, 218620, 244340, 273275, 305425, 415378, 546550, 610850, 830756, 1038445, 1093100, 1221700, 2076890, 4153780, 5192225, 10384450, 20768900]

約数ペア:

[(1, 20768900), (2, 10384450), (4, 5192225), (5, 4153780), (10, 2076890), (17, 1221700), (19, 1093100), (20, 1038445), (25, 830756), (34, 610850), (38, 546550), (50, 415378), (68, 305425), (76, 273275), (85, 244340), (95, 218620), (100, 207689), (170, 122170), (190, 109310), (323, 64300), (340, 61085), (380, 54655), (425, 48868), (475, 43724), (643, 32300), (646, 32150), (850, 24434), (950, 21862), (1286, 16150), (1292, 16075), (1615, 12860), (1700, 12217), (1900, 10931), (2572, 8075), (3215, 6460), (3230, 6430)]