21320680

素因数分解:

$2^3\times 5^1\times {\mathrm{373}}^1\times {\mathrm{1429}}^1$

素因数の和:1813

約数の個数: 32

約数和(自身を含む): 48133800

約数和(自身を除く): 26813120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 373, 746, 1429, 1492, 1865, 2858, 2984, 3730, 5716, 7145, 7460, 11432, 14290, 14920, 28580, 57160, 533017, 1066034, 2132068, 2665085, 4264136, 5330170, 10660340, 21320680]

約数ペア:

[(1, 21320680), (2, 10660340), (4, 5330170), (5, 4264136), (8, 2665085), (10, 2132068), (20, 1066034), (40, 533017), (373, 57160), (746, 28580), (1429, 14920), (1492, 14290), (1865, 11432), (2858, 7460), (2984, 7145), (3730, 5716)]