20819456

素因数分解:

$2^9\times 7^1\times {\mathrm{37}}^1\times {\mathrm{157}}^1$

素因数の和:219

約数の個数: 80

約数和(自身を含む): 49136736

約数和(自身を除く): 28317280

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 37, 56, 64, 74, 112, 128, 148, 157, 224, 256, 259, 296, 314, 448, 512, 518, 592, 628, 896, 1036, 1099, 1184, 1256, 1792, 2072, 2198, 2368, 2512, 3584, 4144, 4396, 4736, 5024, 5809, 8288, 8792, 9472, 10048, 11618, 16576, 17584, 18944, 20096, 23236, 33152, 35168, 40192, 40663, 46472, 66304, 70336, 80384, 81326, 92944, 132608, 140672, 162652, 185888, 281344, 325304, 371776, 562688, 650608, 743552, 1301216, 1487104, 2602432, 2974208, 5204864, 10409728, 20819456]

約数ペア:

[(1, 20819456), (2, 10409728), (4, 5204864), (7, 2974208), (8, 2602432), (14, 1487104), (16, 1301216), (28, 743552), (32, 650608), (37, 562688), (56, 371776), (64, 325304), (74, 281344), (112, 185888), (128, 162652), (148, 140672), (157, 132608), (224, 92944), (256, 81326), (259, 80384), (296, 70336), (314, 66304), (448, 46472), (512, 40663), (518, 40192), (592, 35168), (628, 33152), (896, 23236), (1036, 20096), (1099, 18944), (1184, 17584), (1256, 16576), (1792, 11618), (2072, 10048), (2198, 9472), (2368, 8792), (2512, 8288), (3584, 5809), (4144, 5024), (4396, 4736)]