20687472

素因数分解:

$2^4\times 3^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{257}}^1$

素因数の和:327

約数の個数: 120

約数和(自身を含む): 64047984

約数和(自身を除く): 43360512

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 13, 16, 18, 24, 26, 36, 39, 43, 48, 52, 72, 78, 86, 104, 117, 129, 144, 156, 172, 208, 234, 257, 258, 312, 344, 387, 468, 514, 516, 559, 624, 688, 771, 774, 936, 1028, 1032, 1118, 1542, 1548, 1677, 1872, 2056, 2064, 2236, 2313, 3084, 3096, 3341, 3354, 4112, 4472, 4626, 5031, 6168, 6192, 6682, 6708, 8944, 9252, 10023, 10062, 11051, 12336, 13364, 13416, 18504, 20046, 20124, 22102, 26728, 26832, 30069, 33153, 37008, 40092, 40248, 44204, 53456, 60138, 66306, 80184, 80496, 88408, 99459, 120276, 132612, 143663, 160368, 176816, 198918, 240552, 265224, 287326, 397836, 430989, 481104, 530448, 574652, 795672, 861978, 1149304, 1292967, 1591344, 1723956, 2298608, 2585934, 3447912, 5171868, 6895824, 10343736, 20687472]

約数ペア:

[(1, 20687472), (2, 10343736), (3, 6895824), (4, 5171868), (6, 3447912), (8, 2585934), (9, 2298608), (12, 1723956), (13, 1591344), (16, 1292967), (18, 1149304), (24, 861978), (26, 795672), (36, 574652), (39, 530448), (43, 481104), (48, 430989), (52, 397836), (72, 287326), (78, 265224), (86, 240552), (104, 198918), (117, 176816), (129, 160368), (144, 143663), (156, 132612), (172, 120276), (208, 99459), (234, 88408), (257, 80496), (258, 80184), (312, 66306), (344, 60138), (387, 53456), (468, 44204), (514, 40248), (516, 40092), (559, 37008), (624, 33153), (688, 30069), (771, 26832), (774, 26728), (936, 22102), (1028, 20124), (1032, 20046), (1118, 18504), (1542, 13416), (1548, 13364), (1677, 12336), (1872, 11051), (2056, 10062), (2064, 10023), (2236, 9252), (2313, 8944), (3084, 6708), (3096, 6682), (3341, 6192), (3354, 6168), (4112, 5031), (4472, 4626)]