21491120

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{38377}}^1$

素因数の和:38397

約数の個数: 40

約数和(自身を含む): 57106464

約数和(自身を除く): 35615344

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 38377, 76754, 153508, 191885, 268639, 307016, 383770, 537278, 614032, 767540, 1074556, 1343195, 1535080, 2149112, 2686390, 3070160, 4298224, 5372780, 10745560, 21491120]

約数ペア:

[(1, 21491120), (2, 10745560), (4, 5372780), (5, 4298224), (7, 3070160), (8, 2686390), (10, 2149112), (14, 1535080), (16, 1343195), (20, 1074556), (28, 767540), (35, 614032), (40, 537278), (56, 383770), (70, 307016), (80, 268639), (112, 191885), (140, 153508), (280, 76754), (560, 38377)]