20015420

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{107}}^1\times {\mathrm{199}}^1$

素因数の和:362

約数の個数: 48

約数和(自身を含む): 43545600

約数和(自身を除く): 23530180

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 107, 188, 199, 214, 235, 398, 428, 470, 535, 796, 940, 995, 1070, 1990, 2140, 3980, 5029, 9353, 10058, 18706, 20116, 21293, 25145, 37412, 42586, 46765, 50290, 85172, 93530, 100580, 106465, 187060, 212930, 425860, 1000771, 2001542, 4003084, 5003855, 10007710, 20015420]

約数ペア:

[(1, 20015420), (2, 10007710), (4, 5003855), (5, 4003084), (10, 2001542), (20, 1000771), (47, 425860), (94, 212930), (107, 187060), (188, 106465), (199, 100580), (214, 93530), (235, 85172), (398, 50290), (428, 46765), (470, 42586), (535, 37412), (796, 25145), (940, 21293), (995, 20116), (1070, 18706), (1990, 10058), (2140, 9353), (3980, 5029)]