20798540

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{1117}}^1$

素因数の和:1159

約数の個数: 72

約数和(自身を含む): 53529840

約数和(自身を除く): 32731300

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 49, 70, 76, 95, 98, 133, 140, 190, 196, 245, 266, 380, 490, 532, 665, 931, 980, 1117, 1330, 1862, 2234, 2660, 3724, 4468, 4655, 5585, 7819, 9310, 11170, 15638, 18620, 21223, 22340, 31276, 39095, 42446, 54733, 78190, 84892, 106115, 109466, 148561, 156380, 212230, 218932, 273665, 297122, 424460, 547330, 594244, 742805, 1039927, 1094660, 1485610, 2079854, 2971220, 4159708, 5199635, 10399270, 20798540]

約数ペア:

[(1, 20798540), (2, 10399270), (4, 5199635), (5, 4159708), (7, 2971220), (10, 2079854), (14, 1485610), (19, 1094660), (20, 1039927), (28, 742805), (35, 594244), (38, 547330), (49, 424460), (70, 297122), (76, 273665), (95, 218932), (98, 212230), (133, 156380), (140, 148561), (190, 109466), (196, 106115), (245, 84892), (266, 78190), (380, 54733), (490, 42446), (532, 39095), (665, 31276), (931, 22340), (980, 21223), (1117, 18620), (1330, 15638), (1862, 11170), (2234, 9310), (2660, 7819), (3724, 5585), (4468, 4655)]