21389820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{647}}^1$

素因数の和:707

約数の個数: 96

約数和(自身を含む): 65318400

約数和(自身を除く): 43928580

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 19, 20, 29, 30, 38, 57, 58, 60, 76, 87, 95, 114, 116, 145, 174, 190, 228, 285, 290, 348, 380, 435, 551, 570, 580, 647, 870, 1102, 1140, 1294, 1653, 1740, 1941, 2204, 2588, 2755, 3235, 3306, 3882, 5510, 6470, 6612, 7764, 8265, 9705, 11020, 12293, 12940, 16530, 18763, 19410, 24586, 33060, 36879, 37526, 38820, 49172, 56289, 61465, 73758, 75052, 93815, 112578, 122930, 147516, 184395, 187630, 225156, 245860, 281445, 356497, 368790, 375260, 562890, 712994, 737580, 1069491, 1125780, 1425988, 1782485, 2138982, 3564970, 4277964, 5347455, 7129940, 10694910, 21389820]

約数ペア:

[(1, 21389820), (2, 10694910), (3, 7129940), (4, 5347455), (5, 4277964), (6, 3564970), (10, 2138982), (12, 1782485), (15, 1425988), (19, 1125780), (20, 1069491), (29, 737580), (30, 712994), (38, 562890), (57, 375260), (58, 368790), (60, 356497), (76, 281445), (87, 245860), (95, 225156), (114, 187630), (116, 184395), (145, 147516), (174, 122930), (190, 112578), (228, 93815), (285, 75052), (290, 73758), (348, 61465), (380, 56289), (435, 49172), (551, 38820), (570, 37526), (580, 36879), (647, 33060), (870, 24586), (1102, 19410), (1140, 18763), (1294, 16530), (1653, 12940), (1740, 12293), (1941, 11020), (2204, 9705), (2588, 8265), (2755, 7764), (3235, 6612), (3306, 6470), (3882, 5510)]