20801440

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{223}}^1$

素因数の和:302

約数の個数: 96

約数和(自身を含む): 54867456

約数和(自身を除く): 34066016

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 53, 55, 80, 88, 106, 110, 160, 176, 212, 220, 223, 265, 352, 424, 440, 446, 530, 583, 848, 880, 892, 1060, 1115, 1166, 1696, 1760, 1784, 2120, 2230, 2332, 2453, 2915, 3568, 4240, 4460, 4664, 4906, 5830, 7136, 8480, 8920, 9328, 9812, 11660, 11819, 12265, 17840, 18656, 19624, 23320, 23638, 24530, 35680, 39248, 46640, 47276, 49060, 59095, 78496, 93280, 94552, 98120, 118190, 130009, 189104, 196240, 236380, 260018, 378208, 392480, 472760, 520036, 650045, 945520, 1040072, 1300090, 1891040, 2080144, 2600180, 4160288, 5200360, 10400720, 20801440]

約数ペア:

[(1, 20801440), (2, 10400720), (4, 5200360), (5, 4160288), (8, 2600180), (10, 2080144), (11, 1891040), (16, 1300090), (20, 1040072), (22, 945520), (32, 650045), (40, 520036), (44, 472760), (53, 392480), (55, 378208), (80, 260018), (88, 236380), (106, 196240), (110, 189104), (160, 130009), (176, 118190), (212, 98120), (220, 94552), (223, 93280), (265, 78496), (352, 59095), (424, 49060), (440, 47276), (446, 46640), (530, 39248), (583, 35680), (848, 24530), (880, 23638), (892, 23320), (1060, 19624), (1115, 18656), (1166, 17840), (1696, 12265), (1760, 11819), (1784, 11660), (2120, 9812), (2230, 9328), (2332, 8920), (2453, 8480), (2915, 7136), (3568, 5830), (4240, 4906), (4460, 4664)]