21338940

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{47}}^2$

素因数の和:136

約数の個数: 144

約数和(自身を含む): 72801792

約数和(自身を除く): 51462852

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 23, 28, 30, 35, 42, 46, 47, 60, 69, 70, 84, 92, 94, 105, 115, 138, 140, 141, 161, 188, 210, 230, 235, 276, 282, 322, 329, 345, 420, 460, 470, 483, 564, 644, 658, 690, 705, 805, 940, 966, 987, 1081, 1316, 1380, 1410, 1610, 1645, 1932, 1974, 2162, 2209, 2415, 2820, 3220, 3243, 3290, 3948, 4324, 4418, 4830, 4935, 5405, 6486, 6580, 6627, 7567, 8836, 9660, 9870, 10810, 11045, 12972, 13254, 15134, 15463, 16215, 19740, 21620, 22090, 22701, 26508, 30268, 30926, 32430, 33135, 37835, 44180, 45402, 46389, 50807, 61852, 64860, 66270, 75670, 77315, 90804, 92778, 101614, 113505, 132540, 151340, 152421, 154630, 185556, 203228, 227010, 231945, 254035, 304842, 309260, 355649, 454020, 463890, 508070, 609684, 711298, 762105, 927780, 1016140, 1066947, 1422596, 1524210, 1778245, 2133894, 3048420, 3556490, 4267788, 5334735, 7112980, 10669470, 21338940]

約数ペア:

[(1, 21338940), (2, 10669470), (3, 7112980), (4, 5334735), (5, 4267788), (6, 3556490), (7, 3048420), (10, 2133894), (12, 1778245), (14, 1524210), (15, 1422596), (20, 1066947), (21, 1016140), (23, 927780), (28, 762105), (30, 711298), (35, 609684), (42, 508070), (46, 463890), (47, 454020), (60, 355649), (69, 309260), (70, 304842), (84, 254035), (92, 231945), (94, 227010), (105, 203228), (115, 185556), (138, 154630), (140, 152421), (141, 151340), (161, 132540), (188, 113505), (210, 101614), (230, 92778), (235, 90804), (276, 77315), (282, 75670), (322, 66270), (329, 64860), (345, 61852), (420, 50807), (460, 46389), (470, 45402), (483, 44180), (564, 37835), (644, 33135), (658, 32430), (690, 30926), (705, 30268), (805, 26508), (940, 22701), (966, 22090), (987, 21620), (1081, 19740), (1316, 16215), (1380, 15463), (1410, 15134), (1610, 13254), (1645, 12972), (1932, 11045), (1974, 10810), (2162, 9870), (2209, 9660), (2415, 8836), (2820, 7567), (3220, 6627), (3243, 6580), (3290, 6486), (3948, 5405), (4324, 4935), (4418, 4830)]