20389010

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{739}}^1$

素因数の和:866

約数の個数: 32

約数和(自身を含む): 38361600

約数和(自身を除く): 17972590

約数列:

[1, 2, 5, 10, 31, 62, 89, 155, 178, 310, 445, 739, 890, 1478, 2759, 3695, 5518, 7390, 13795, 22909, 27590, 45818, 65771, 114545, 131542, 229090, 328855, 657710, 2038901, 4077802, 10194505, 20389010]

約数ペア:

[(1, 20389010), (2, 10194505), (5, 4077802), (10, 2038901), (31, 657710), (62, 328855), (89, 229090), (155, 131542), (178, 114545), (310, 65771), (445, 45818), (739, 27590), (890, 22909), (1478, 13795), (2759, 7390), (3695, 5518)]