20971020

素因数分解:

$2^2\times 3^1\times 5^1\times 7^3\times {\mathrm{1019}}^1$

素因数の和:1052

約数の個数: 96

約数和(自身を含む): 68544000

約数和(自身を除く): 47572980

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 98, 105, 140, 147, 196, 210, 245, 294, 343, 420, 490, 588, 686, 735, 980, 1019, 1029, 1372, 1470, 1715, 2038, 2058, 2940, 3057, 3430, 4076, 4116, 5095, 5145, 6114, 6860, 7133, 10190, 10290, 12228, 14266, 15285, 20380, 20580, 21399, 28532, 30570, 35665, 42798, 49931, 61140, 71330, 85596, 99862, 106995, 142660, 149793, 199724, 213990, 249655, 299586, 349517, 427980, 499310, 599172, 699034, 748965, 998620, 1048551, 1398068, 1497930, 1747585, 2097102, 2995860, 3495170, 4194204, 5242755, 6990340, 10485510, 20971020]

約数ペア:

[(1, 20971020), (2, 10485510), (3, 6990340), (4, 5242755), (5, 4194204), (6, 3495170), (7, 2995860), (10, 2097102), (12, 1747585), (14, 1497930), (15, 1398068), (20, 1048551), (21, 998620), (28, 748965), (30, 699034), (35, 599172), (42, 499310), (49, 427980), (60, 349517), (70, 299586), (84, 249655), (98, 213990), (105, 199724), (140, 149793), (147, 142660), (196, 106995), (210, 99862), (245, 85596), (294, 71330), (343, 61140), (420, 49931), (490, 42798), (588, 35665), (686, 30570), (735, 28532), (980, 21399), (1019, 20580), (1029, 20380), (1372, 15285), (1470, 14266), (1715, 12228), (2038, 10290), (2058, 10190), (2940, 7133), (3057, 6860), (3430, 6114), (4076, 5145), (4116, 5095)]