20347180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1$

素因数の和:199

約数の個数: 96

約数和(自身を含む): 52254720

約数和(自身を除く): 31907540

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 70, 71, 89, 92, 115, 140, 142, 161, 178, 230, 284, 322, 355, 356, 445, 460, 497, 623, 644, 710, 805, 890, 994, 1246, 1420, 1610, 1633, 1780, 1988, 2047, 2485, 2492, 3115, 3220, 3266, 4094, 4970, 6230, 6319, 6532, 8165, 8188, 9940, 10235, 11431, 12460, 12638, 14329, 16330, 20470, 22862, 25276, 28658, 31595, 32660, 40940, 44233, 45724, 57155, 57316, 63190, 71645, 88466, 114310, 126380, 143290, 145337, 176932, 221165, 228620, 286580, 290674, 442330, 581348, 726685, 884660, 1017359, 1453370, 2034718, 2906740, 4069436, 5086795, 10173590, 20347180]

約数ペア:

[(1, 20347180), (2, 10173590), (4, 5086795), (5, 4069436), (7, 2906740), (10, 2034718), (14, 1453370), (20, 1017359), (23, 884660), (28, 726685), (35, 581348), (46, 442330), (70, 290674), (71, 286580), (89, 228620), (92, 221165), (115, 176932), (140, 145337), (142, 143290), (161, 126380), (178, 114310), (230, 88466), (284, 71645), (322, 63190), (355, 57316), (356, 57155), (445, 45724), (460, 44233), (497, 40940), (623, 32660), (644, 31595), (710, 28658), (805, 25276), (890, 22862), (994, 20470), (1246, 16330), (1420, 14329), (1610, 12638), (1633, 12460), (1780, 11431), (1988, 10235), (2047, 9940), (2485, 8188), (2492, 8165), (3115, 6532), (3220, 6319), (3266, 6230), (4094, 4970)]