21304660

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{1223}}^1$

素因数の和:1312

約数の個数: 48

約数和(自身を含む): 48940416

約数和(自身を除く): 27635756

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 67, 130, 134, 260, 268, 335, 670, 871, 1223, 1340, 1742, 2446, 3484, 4355, 4892, 6115, 8710, 12230, 15899, 17420, 24460, 31798, 63596, 79495, 81941, 158990, 163882, 317980, 327764, 409705, 819410, 1065233, 1638820, 2130466, 4260932, 5326165, 10652330, 21304660]

約数ペア:

[(1, 21304660), (2, 10652330), (4, 5326165), (5, 4260932), (10, 2130466), (13, 1638820), (20, 1065233), (26, 819410), (52, 409705), (65, 327764), (67, 317980), (130, 163882), (134, 158990), (260, 81941), (268, 79495), (335, 63596), (670, 31798), (871, 24460), (1223, 17420), (1340, 15899), (1742, 12230), (2446, 8710), (3484, 6115), (4355, 4892)]