19912020

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{307}}^1$

素因数の和:389

約数の個数: 96

約数和(自身を含む): 59609088

約数和(自身を除く): 39697068

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 23, 30, 46, 47, 60, 69, 92, 94, 115, 138, 141, 188, 230, 235, 276, 282, 307, 345, 460, 470, 564, 614, 690, 705, 921, 940, 1081, 1228, 1380, 1410, 1535, 1842, 2162, 2820, 3070, 3243, 3684, 4324, 4605, 5405, 6140, 6486, 7061, 9210, 10810, 12972, 14122, 14429, 16215, 18420, 21183, 21620, 28244, 28858, 32430, 35305, 42366, 43287, 57716, 64860, 70610, 72145, 84732, 86574, 105915, 141220, 144290, 173148, 211830, 216435, 288580, 331867, 423660, 432870, 663734, 865740, 995601, 1327468, 1659335, 1991202, 3318670, 3982404, 4978005, 6637340, 9956010, 19912020]

約数ペア:

[(1, 19912020), (2, 9956010), (3, 6637340), (4, 4978005), (5, 3982404), (6, 3318670), (10, 1991202), (12, 1659335), (15, 1327468), (20, 995601), (23, 865740), (30, 663734), (46, 432870), (47, 423660), (60, 331867), (69, 288580), (92, 216435), (94, 211830), (115, 173148), (138, 144290), (141, 141220), (188, 105915), (230, 86574), (235, 84732), (276, 72145), (282, 70610), (307, 64860), (345, 57716), (460, 43287), (470, 42366), (564, 35305), (614, 32430), (690, 28858), (705, 28244), (921, 21620), (940, 21183), (1081, 18420), (1228, 16215), (1380, 14429), (1410, 14122), (1535, 12972), (1842, 10810), (2162, 9210), (2820, 7061), (3070, 6486), (3243, 6140), (3684, 5405), (4324, 4605)]