20662500

素因数分解:

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

素因数の和:80

約数の個数: 144

約数和(自身を含む): 65620800

約数和(自身を除く): 44958300

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 19, 20, 25, 29, 30, 38, 50, 57, 58, 60, 75, 76, 87, 95, 100, 114, 116, 125, 145, 150, 174, 190, 228, 250, 285, 290, 300, 348, 375, 380, 435, 475, 500, 551, 570, 580, 625, 725, 750, 870, 950, 1102, 1140, 1250, 1425, 1450, 1500, 1653, 1740, 1875, 1900, 2175, 2204, 2375, 2500, 2755, 2850, 2900, 3125, 3306, 3625, 3750, 4350, 4750, 5510, 5700, 6250, 6612, 7125, 7250, 7500, 8265, 8700, 9375, 9500, 10875, 11020, 11875, 12500, 13775, 14250, 14500, 16530, 18125, 18750, 21750, 23750, 27550, 28500, 33060, 35625, 36250, 37500, 41325, 43500, 47500, 54375, 55100, 59375, 68875, 71250, 72500, 82650, 90625, 108750, 118750, 137750, 142500, 165300, 178125, 181250, 206625, 217500, 237500, 271875, 275500, 344375, 356250, 362500, 413250, 543750, 688750, 712500, 826500, 1033125, 1087500, 1377500, 1721875, 2066250, 3443750, 4132500, 5165625, 6887500, 10331250, 20662500]

約数ペア:

[(1, 20662500), (2, 10331250), (3, 6887500), (4, 5165625), (5, 4132500), (6, 3443750), (10, 2066250), (12, 1721875), (15, 1377500), (19, 1087500), (20, 1033125), (25, 826500), (29, 712500), (30, 688750), (38, 543750), (50, 413250), (57, 362500), (58, 356250), (60, 344375), (75, 275500), (76, 271875), (87, 237500), (95, 217500), (100, 206625), (114, 181250), (116, 178125), (125, 165300), (145, 142500), (150, 137750), (174, 118750), (190, 108750), (228, 90625), (250, 82650), (285, 72500), (290, 71250), (300, 68875), (348, 59375), (375, 55100), (380, 54375), (435, 47500), (475, 43500), (500, 41325), (551, 37500), (570, 36250), (580, 35625), (625, 33060), (725, 28500), (750, 27550), (870, 23750), (950, 21750), (1102, 18750), (1140, 18125), (1250, 16530), (1425, 14500), (1450, 14250), (1500, 13775), (1653, 12500), (1740, 11875), (1875, 11020), (1900, 10875), (2175, 9500), (2204, 9375), (2375, 8700), (2500, 8265), (2755, 7500), (2850, 7250), (2900, 7125), (3125, 6612), (3306, 6250), (3625, 5700), (3750, 5510), (4350, 4750)]