20861790

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{67}}^1\times {\mathrm{97}}^1\times {\mathrm{107}}^1$

素因数の和:281

約数の個数: 64

約数和(自身を含む): 51819264

約数和(自身を除く): 30957474

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 67, 97, 107, 134, 194, 201, 214, 291, 321, 335, 402, 485, 535, 582, 642, 670, 970, 1005, 1070, 1455, 1605, 2010, 2910, 3210, 6499, 7169, 10379, 12998, 14338, 19497, 20758, 21507, 31137, 32495, 35845, 38994, 43014, 51895, 62274, 64990, 71690, 97485, 103790, 107535, 155685, 194970, 215070, 311370, 695393, 1390786, 2086179, 3476965, 4172358, 6953930, 10430895, 20861790]

約数ペア:

[(1, 20861790), (2, 10430895), (3, 6953930), (5, 4172358), (6, 3476965), (10, 2086179), (15, 1390786), (30, 695393), (67, 311370), (97, 215070), (107, 194970), (134, 155685), (194, 107535), (201, 103790), (214, 97485), (291, 71690), (321, 64990), (335, 62274), (402, 51895), (485, 43014), (535, 38994), (582, 35845), (642, 32495), (670, 31137), (970, 21507), (1005, 20758), (1070, 19497), (1455, 14338), (1605, 12998), (2010, 10379), (2910, 7169), (3210, 6499)]