20114980

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{439}}^1$

素因数の和:556

約数の個数: 48

約数和(自身を含む): 44352000

約数和(自身を除く): 24237020

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 79, 116, 145, 158, 290, 316, 395, 439, 580, 790, 878, 1580, 1756, 2195, 2291, 4390, 4582, 8780, 9164, 11455, 12731, 22910, 25462, 34681, 45820, 50924, 63655, 69362, 127310, 138724, 173405, 254620, 346810, 693620, 1005749, 2011498, 4022996, 5028745, 10057490, 20114980]

約数ペア:

[(1, 20114980), (2, 10057490), (4, 5028745), (5, 4022996), (10, 2011498), (20, 1005749), (29, 693620), (58, 346810), (79, 254620), (116, 173405), (145, 138724), (158, 127310), (290, 69362), (316, 63655), (395, 50924), (439, 45820), (580, 34681), (790, 25462), (878, 22910), (1580, 12731), (1756, 11455), (2195, 9164), (2291, 8780), (4390, 4582)]