21931780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{1259}}^1$

素因数の和:1348

約数の個数: 48

約数和(自身を含む): 50379840

約数和(自身を除く): 28448060

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 67, 130, 134, 260, 268, 335, 670, 871, 1259, 1340, 1742, 2518, 3484, 4355, 5036, 6295, 8710, 12590, 16367, 17420, 25180, 32734, 65468, 81835, 84353, 163670, 168706, 327340, 337412, 421765, 843530, 1096589, 1687060, 2193178, 4386356, 5482945, 10965890, 21931780]

約数ペア:

[(1, 21931780), (2, 10965890), (4, 5482945), (5, 4386356), (10, 2193178), (13, 1687060), (20, 1096589), (26, 843530), (52, 421765), (65, 337412), (67, 327340), (130, 168706), (134, 163670), (260, 84353), (268, 81835), (335, 65468), (670, 32734), (871, 25180), (1259, 17420), (1340, 16367), (1742, 12590), (2518, 8710), (3484, 6295), (4355, 5036)]