19781300

素因数分解:

$2^2\times 5^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{367}}^1$

素因数の和:406

約数の個数: 108

約数和(自身を含む): 54621504

約数和(自身を除く): 34840204

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 25, 28, 35, 44, 49, 50, 55, 70, 77, 98, 100, 110, 140, 154, 175, 196, 220, 245, 275, 308, 350, 367, 385, 490, 539, 550, 700, 734, 770, 980, 1078, 1100, 1225, 1468, 1540, 1835, 1925, 2156, 2450, 2569, 2695, 3670, 3850, 4037, 4900, 5138, 5390, 7340, 7700, 8074, 9175, 10276, 10780, 12845, 13475, 16148, 17983, 18350, 20185, 25690, 26950, 28259, 35966, 36700, 40370, 51380, 53900, 56518, 64225, 71932, 80740, 89915, 100925, 113036, 128450, 141295, 179830, 197813, 201850, 256900, 282590, 359660, 395626, 403700, 449575, 565180, 706475, 791252, 899150, 989065, 1412950, 1798300, 1978130, 2825900, 3956260, 4945325, 9890650, 19781300]

約数ペア:

[(1, 19781300), (2, 9890650), (4, 4945325), (5, 3956260), (7, 2825900), (10, 1978130), (11, 1798300), (14, 1412950), (20, 989065), (22, 899150), (25, 791252), (28, 706475), (35, 565180), (44, 449575), (49, 403700), (50, 395626), (55, 359660), (70, 282590), (77, 256900), (98, 201850), (100, 197813), (110, 179830), (140, 141295), (154, 128450), (175, 113036), (196, 100925), (220, 89915), (245, 80740), (275, 71932), (308, 64225), (350, 56518), (367, 53900), (385, 51380), (490, 40370), (539, 36700), (550, 35966), (700, 28259), (734, 26950), (770, 25690), (980, 20185), (1078, 18350), (1100, 17983), (1225, 16148), (1468, 13475), (1540, 12845), (1835, 10780), (1925, 10276), (2156, 9175), (2450, 8074), (2569, 7700), (2695, 7340), (3670, 5390), (3850, 5138), (4037, 4900)]