21003920

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{37507}}^1$

素因数の和:37527

約数の個数: 40

約数和(自身を含む): 55811904

約数和(自身を除く): 34807984

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 37507, 75014, 150028, 187535, 262549, 300056, 375070, 525098, 600112, 750140, 1050196, 1312745, 1500280, 2100392, 2625490, 3000560, 4200784, 5250980, 10501960, 21003920]

約数ペア:

[(1, 21003920), (2, 10501960), (4, 5250980), (5, 4200784), (7, 3000560), (8, 2625490), (10, 2100392), (14, 1500280), (16, 1312745), (20, 1050196), (28, 750140), (35, 600112), (40, 525098), (56, 375070), (70, 300056), (80, 262549), (112, 187535), (140, 150028), (280, 75014), (560, 37507)]