20388550

素因数分解:

$2^1\times 5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{4481}}^1$

素因数の和:4513

約数の個数: 48

約数和(自身を含む): 46684512

約数和(自身を除く): 26295962

約数列:

[1, 2, 5, 7, 10, 13, 14, 25, 26, 35, 50, 65, 70, 91, 130, 175, 182, 325, 350, 455, 650, 910, 2275, 4481, 4550, 8962, 22405, 31367, 44810, 58253, 62734, 112025, 116506, 156835, 224050, 291265, 313670, 407771, 582530, 784175, 815542, 1456325, 1568350, 2038855, 2912650, 4077710, 10194275, 20388550]

約数ペア:

[(1, 20388550), (2, 10194275), (5, 4077710), (7, 2912650), (10, 2038855), (13, 1568350), (14, 1456325), (25, 815542), (26, 784175), (35, 582530), (50, 407771), (65, 313670), (70, 291265), (91, 224050), (130, 156835), (175, 116506), (182, 112025), (325, 62734), (350, 58253), (455, 44810), (650, 31367), (910, 22405), (2275, 8962), (4481, 4550)]