21243020

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{83}}^1\times {\mathrm{191}}^1$

素因数の和:350

約数の個数: 48

約数和(自身を含む): 46061568

約数和(自身を除く): 24818548

約数列:

[1, 2, 4, 5, 10, 20, 67, 83, 134, 166, 191, 268, 332, 335, 382, 415, 670, 764, 830, 955, 1340, 1660, 1910, 3820, 5561, 11122, 12797, 15853, 22244, 25594, 27805, 31706, 51188, 55610, 63412, 63985, 79265, 111220, 127970, 158530, 255940, 317060, 1062151, 2124302, 4248604, 5310755, 10621510, 21243020]

約数ペア:

[(1, 21243020), (2, 10621510), (4, 5310755), (5, 4248604), (10, 2124302), (20, 1062151), (67, 317060), (83, 255940), (134, 158530), (166, 127970), (191, 111220), (268, 79265), (332, 63985), (335, 63412), (382, 55610), (415, 51188), (670, 31706), (764, 27805), (830, 25594), (955, 22244), (1340, 15853), (1660, 12797), (1910, 11122), (3820, 5561)]