21131838

素因数分解:

$2^1\times 3^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1$

素因数の和:151

約数の個数: 144

約数和(自身を含む): 60999120

約数和(自身を除く): 39867282

約数列:

[1, 2, 3, 6, 7, 9, 13, 14, 18, 19, 21, 26, 38, 39, 42, 49, 57, 63, 78, 91, 97, 98, 114, 117, 126, 133, 147, 171, 182, 194, 234, 247, 266, 273, 291, 294, 342, 399, 441, 494, 546, 582, 637, 679, 741, 798, 819, 873, 882, 931, 1197, 1261, 1274, 1358, 1482, 1638, 1729, 1746, 1843, 1862, 1911, 2037, 2223, 2394, 2522, 2793, 3458, 3686, 3783, 3822, 4074, 4446, 4753, 5187, 5529, 5586, 5733, 6111, 7566, 8379, 8827, 9506, 10374, 11058, 11349, 11466, 12103, 12222, 12901, 14259, 15561, 16587, 16758, 17654, 22698, 23959, 24206, 25802, 26481, 28518, 31122, 33174, 36309, 38703, 42777, 47918, 52962, 61789, 71877, 72618, 77406, 79443, 85554, 90307, 108927, 116109, 123578, 143754, 158886, 167713, 180614, 185367, 215631, 217854, 232218, 270921, 335426, 370734, 431262, 503139, 541842, 556101, 812763, 1006278, 1112202, 1173991, 1509417, 1625526, 2347982, 3018834, 3521973, 7043946, 10565919, 21131838]

約数ペア:

[(1, 21131838), (2, 10565919), (3, 7043946), (6, 3521973), (7, 3018834), (9, 2347982), (13, 1625526), (14, 1509417), (18, 1173991), (19, 1112202), (21, 1006278), (26, 812763), (38, 556101), (39, 541842), (42, 503139), (49, 431262), (57, 370734), (63, 335426), (78, 270921), (91, 232218), (97, 217854), (98, 215631), (114, 185367), (117, 180614), (126, 167713), (133, 158886), (147, 143754), (171, 123578), (182, 116109), (194, 108927), (234, 90307), (247, 85554), (266, 79443), (273, 77406), (291, 72618), (294, 71877), (342, 61789), (399, 52962), (441, 47918), (494, 42777), (546, 38703), (582, 36309), (637, 33174), (679, 31122), (741, 28518), (798, 26481), (819, 25802), (873, 24206), (882, 23959), (931, 22698), (1197, 17654), (1261, 16758), (1274, 16587), (1358, 15561), (1482, 14259), (1638, 12901), (1729, 12222), (1746, 12103), (1843, 11466), (1862, 11349), (1911, 11058), (2037, 10374), (2223, 9506), (2394, 8827), (2522, 8379), (2793, 7566), (3458, 6111), (3686, 5733), (3783, 5586), (3822, 5529), (4074, 5187), (4446, 4753)]