20668648

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1$

素因数の和:155

約数の個数: 128

約数和(自身を含む): 54432000

約数和(自身を除く): 33763352

約数列:

[1, 2, 4, 7, 8, 11, 13, 14, 22, 26, 28, 29, 44, 52, 56, 58, 77, 88, 89, 91, 104, 116, 143, 154, 178, 182, 203, 232, 286, 308, 319, 356, 364, 377, 406, 572, 616, 623, 638, 712, 728, 754, 812, 979, 1001, 1144, 1157, 1246, 1276, 1508, 1624, 1958, 2002, 2233, 2314, 2492, 2552, 2581, 2639, 3016, 3916, 4004, 4147, 4466, 4628, 4984, 5162, 5278, 6853, 7832, 8008, 8099, 8294, 8932, 9256, 10324, 10556, 12727, 13706, 16198, 16588, 17864, 18067, 20648, 21112, 25454, 27412, 28391, 29029, 32396, 33176, 33553, 36134, 50908, 54824, 56782, 58058, 64792, 67106, 72268, 89089, 101816, 113564, 116116, 134212, 144536, 178178, 198737, 227128, 232232, 234871, 268424, 356356, 369083, 397474, 469742, 712712, 738166, 794948, 939484, 1476332, 1589896, 1878968, 2583581, 2952664, 5167162, 10334324, 20668648]

約数ペア:

[(1, 20668648), (2, 10334324), (4, 5167162), (7, 2952664), (8, 2583581), (11, 1878968), (13, 1589896), (14, 1476332), (22, 939484), (26, 794948), (28, 738166), (29, 712712), (44, 469742), (52, 397474), (56, 369083), (58, 356356), (77, 268424), (88, 234871), (89, 232232), (91, 227128), (104, 198737), (116, 178178), (143, 144536), (154, 134212), (178, 116116), (182, 113564), (203, 101816), (232, 89089), (286, 72268), (308, 67106), (319, 64792), (356, 58058), (364, 56782), (377, 54824), (406, 50908), (572, 36134), (616, 33553), (623, 33176), (638, 32396), (712, 29029), (728, 28391), (754, 27412), (812, 25454), (979, 21112), (1001, 20648), (1144, 18067), (1157, 17864), (1246, 16588), (1276, 16198), (1508, 13706), (1624, 12727), (1958, 10556), (2002, 10324), (2233, 9256), (2314, 8932), (2492, 8294), (2552, 8099), (2581, 8008), (2639, 7832), (3016, 6853), (3916, 5278), (4004, 5162), (4147, 4984), (4466, 4628)]