20808900

素因数分解:

$2^2\times 3^4\times 5^2\times 7^1\times {\mathrm{367}}^1$

素因数の和:400

約数の個数: 180

約数和(自身を含む): 77300608

約数和(自身を除く): 56491708

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 25, 27, 28, 30, 35, 36, 42, 45, 50, 54, 60, 63, 70, 75, 81, 84, 90, 100, 105, 108, 126, 135, 140, 150, 162, 175, 180, 189, 210, 225, 252, 270, 300, 315, 324, 350, 367, 378, 405, 420, 450, 525, 540, 567, 630, 675, 700, 734, 756, 810, 900, 945, 1050, 1101, 1134, 1260, 1350, 1468, 1575, 1620, 1835, 1890, 2025, 2100, 2202, 2268, 2569, 2700, 2835, 3150, 3303, 3670, 3780, 4050, 4404, 4725, 5138, 5505, 5670, 6300, 6606, 7340, 7707, 8100, 9175, 9450, 9909, 10276, 11010, 11340, 12845, 13212, 14175, 15414, 16515, 18350, 18900, 19818, 22020, 23121, 25690, 27525, 28350, 29727, 30828, 33030, 36700, 38535, 39636, 46242, 49545, 51380, 55050, 56700, 59454, 64225, 66060, 69363, 77070, 82575, 92484, 99090, 110100, 115605, 118908, 128450, 138726, 148635, 154140, 165150, 192675, 198180, 208089, 231210, 247725, 256900, 277452, 297270, 330300, 346815, 385350, 416178, 462420, 495450, 578025, 594540, 693630, 743175, 770700, 832356, 990900, 1040445, 1156050, 1387260, 1486350, 1734075, 2080890, 2312100, 2972700, 3468150, 4161780, 5202225, 6936300, 10404450, 20808900]

約数ペア:

[(1, 20808900), (2, 10404450), (3, 6936300), (4, 5202225), (5, 4161780), (6, 3468150), (7, 2972700), (9, 2312100), (10, 2080890), (12, 1734075), (14, 1486350), (15, 1387260), (18, 1156050), (20, 1040445), (21, 990900), (25, 832356), (27, 770700), (28, 743175), (30, 693630), (35, 594540), (36, 578025), (42, 495450), (45, 462420), (50, 416178), (54, 385350), (60, 346815), (63, 330300), (70, 297270), (75, 277452), (81, 256900), (84, 247725), (90, 231210), (100, 208089), (105, 198180), (108, 192675), (126, 165150), (135, 154140), (140, 148635), (150, 138726), (162, 128450), (175, 118908), (180, 115605), (189, 110100), (210, 99090), (225, 92484), (252, 82575), (270, 77070), (300, 69363), (315, 66060), (324, 64225), (350, 59454), (367, 56700), (378, 55050), (405, 51380), (420, 49545), (450, 46242), (525, 39636), (540, 38535), (567, 36700), (630, 33030), (675, 30828), (700, 29727), (734, 28350), (756, 27525), (810, 25690), (900, 23121), (945, 22020), (1050, 19818), (1101, 18900), (1134, 18350), (1260, 16515), (1350, 15414), (1468, 14175), (1575, 13212), (1620, 12845), (1835, 11340), (1890, 11010), (2025, 10276), (2100, 9909), (2202, 9450), (2268, 9175), (2569, 8100), (2700, 7707), (2835, 7340), (3150, 6606), (3303, 6300), (3670, 5670), (3780, 5505), (4050, 5138), (4404, 4725)]