21361480

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{107}}^1$

素因数の和:179

約数の個数: 128

約数和(自身を含む): 59719680

約数和(自身を除く): 38358200

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 23, 28, 31, 35, 40, 46, 56, 62, 70, 92, 107, 115, 124, 140, 155, 161, 184, 214, 217, 230, 248, 280, 310, 322, 428, 434, 460, 535, 620, 644, 713, 749, 805, 856, 868, 920, 1070, 1085, 1240, 1288, 1426, 1498, 1610, 1736, 2140, 2170, 2461, 2852, 2996, 3220, 3317, 3565, 3745, 4280, 4340, 4922, 4991, 5704, 5992, 6440, 6634, 7130, 7490, 8680, 9844, 9982, 12305, 13268, 14260, 14980, 16585, 17227, 19688, 19964, 23219, 24610, 24955, 26536, 28520, 29960, 33170, 34454, 39928, 46438, 49220, 49910, 66340, 68908, 76291, 86135, 92876, 98440, 99820, 116095, 132680, 137816, 152582, 172270, 185752, 199640, 232190, 305164, 344540, 381455, 464380, 534037, 610328, 689080, 762910, 928760, 1068074, 1525820, 2136148, 2670185, 3051640, 4272296, 5340370, 10680740, 21361480]

約数ペア:

[(1, 21361480), (2, 10680740), (4, 5340370), (5, 4272296), (7, 3051640), (8, 2670185), (10, 2136148), (14, 1525820), (20, 1068074), (23, 928760), (28, 762910), (31, 689080), (35, 610328), (40, 534037), (46, 464380), (56, 381455), (62, 344540), (70, 305164), (92, 232190), (107, 199640), (115, 185752), (124, 172270), (140, 152582), (155, 137816), (161, 132680), (184, 116095), (214, 99820), (217, 98440), (230, 92876), (248, 86135), (280, 76291), (310, 68908), (322, 66340), (428, 49910), (434, 49220), (460, 46438), (535, 39928), (620, 34454), (644, 33170), (713, 29960), (749, 28520), (805, 26536), (856, 24955), (868, 24610), (920, 23219), (1070, 19964), (1085, 19688), (1240, 17227), (1288, 16585), (1426, 14980), (1498, 14260), (1610, 13268), (1736, 12305), (2140, 9982), (2170, 9844), (2461, 8680), (2852, 7490), (2996, 7130), (3220, 6634), (3317, 6440), (3565, 5992), (3745, 5704), (4280, 4991), (4340, 4922)]