21808360

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{1097}}^1$

素因数の和:1186

約数の個数: 64

約数和(自身を含む): 56920320

約数和(自身を除く): 35111960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 71, 140, 142, 280, 284, 355, 497, 568, 710, 994, 1097, 1420, 1988, 2194, 2485, 2840, 3976, 4388, 4970, 5485, 7679, 8776, 9940, 10970, 15358, 19880, 21940, 30716, 38395, 43880, 61432, 76790, 77887, 153580, 155774, 307160, 311548, 389435, 545209, 623096, 778870, 1090418, 1557740, 2180836, 2726045, 3115480, 4361672, 5452090, 10904180, 21808360]

約数ペア:

[(1, 21808360), (2, 10904180), (4, 5452090), (5, 4361672), (7, 3115480), (8, 2726045), (10, 2180836), (14, 1557740), (20, 1090418), (28, 778870), (35, 623096), (40, 545209), (56, 389435), (70, 311548), (71, 307160), (140, 155774), (142, 153580), (280, 77887), (284, 76790), (355, 61432), (497, 43880), (568, 38395), (710, 30716), (994, 21940), (1097, 19880), (1420, 15358), (1988, 10970), (2194, 9940), (2485, 8776), (2840, 7679), (3976, 5485), (4388, 4970)]