21788820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{277}}^1$

素因数の和:334

約数の個数: 144

約数和(自身を含む): 72858240

約数和(自身を除く): 51069420

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 23, 30, 36, 38, 45, 46, 57, 60, 69, 76, 90, 92, 95, 114, 115, 138, 171, 180, 190, 207, 228, 230, 276, 277, 285, 342, 345, 380, 414, 437, 460, 554, 570, 684, 690, 828, 831, 855, 874, 1035, 1108, 1140, 1311, 1380, 1385, 1662, 1710, 1748, 2070, 2185, 2493, 2622, 2770, 3324, 3420, 3933, 4140, 4155, 4370, 4986, 5244, 5263, 5540, 6371, 6555, 7866, 8310, 8740, 9972, 10526, 12465, 12742, 13110, 15732, 15789, 16620, 19113, 19665, 21052, 24930, 25484, 26220, 26315, 31578, 31855, 38226, 39330, 47367, 49860, 52630, 57339, 63156, 63710, 76452, 78660, 78945, 94734, 95565, 105260, 114678, 121049, 127420, 157890, 189468, 191130, 229356, 236835, 242098, 286695, 315780, 363147, 382260, 473670, 484196, 573390, 605245, 726294, 947340, 1089441, 1146780, 1210490, 1452588, 1815735, 2178882, 2420980, 3631470, 4357764, 5447205, 7262940, 10894410, 21788820]

約数ペア:

[(1, 21788820), (2, 10894410), (3, 7262940), (4, 5447205), (5, 4357764), (6, 3631470), (9, 2420980), (10, 2178882), (12, 1815735), (15, 1452588), (18, 1210490), (19, 1146780), (20, 1089441), (23, 947340), (30, 726294), (36, 605245), (38, 573390), (45, 484196), (46, 473670), (57, 382260), (60, 363147), (69, 315780), (76, 286695), (90, 242098), (92, 236835), (95, 229356), (114, 191130), (115, 189468), (138, 157890), (171, 127420), (180, 121049), (190, 114678), (207, 105260), (228, 95565), (230, 94734), (276, 78945), (277, 78660), (285, 76452), (342, 63710), (345, 63156), (380, 57339), (414, 52630), (437, 49860), (460, 47367), (554, 39330), (570, 38226), (684, 31855), (690, 31578), (828, 26315), (831, 26220), (855, 25484), (874, 24930), (1035, 21052), (1108, 19665), (1140, 19113), (1311, 16620), (1380, 15789), (1385, 15732), (1662, 13110), (1710, 12742), (1748, 12465), (2070, 10526), (2185, 9972), (2493, 8740), (2622, 8310), (2770, 7866), (3324, 6555), (3420, 6371), (3933, 5540), (4140, 5263), (4155, 5244), (4370, 4986)]