20440784

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{139}}^1$

素因数の和:268

約数の個数: 80

約数和(自身を含む): 49580160

約数和(自身を除く): 29139376

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 52, 56, 91, 101, 104, 112, 139, 182, 202, 208, 278, 364, 404, 556, 707, 728, 808, 973, 1112, 1313, 1414, 1456, 1616, 1807, 1946, 2224, 2626, 2828, 3614, 3892, 5252, 5656, 7228, 7784, 9191, 10504, 11312, 12649, 14039, 14456, 15568, 18382, 21008, 25298, 28078, 28912, 36764, 50596, 56156, 73528, 98273, 101192, 112312, 147056, 182507, 196546, 202384, 224624, 365014, 393092, 730028, 786184, 1277549, 1460056, 1572368, 2555098, 2920112, 5110196, 10220392, 20440784]

約数ペア:

[(1, 20440784), (2, 10220392), (4, 5110196), (7, 2920112), (8, 2555098), (13, 1572368), (14, 1460056), (16, 1277549), (26, 786184), (28, 730028), (52, 393092), (56, 365014), (91, 224624), (101, 202384), (104, 196546), (112, 182507), (139, 147056), (182, 112312), (202, 101192), (208, 98273), (278, 73528), (364, 56156), (404, 50596), (556, 36764), (707, 28912), (728, 28078), (808, 25298), (973, 21008), (1112, 18382), (1313, 15568), (1414, 14456), (1456, 14039), (1616, 12649), (1807, 11312), (1946, 10504), (2224, 9191), (2626, 7784), (2828, 7228), (3614, 5656), (3892, 5252)]