20398820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{1171}}^1$

素因数の和:1260

約数の個数: 48

約数和(自身を含む): 46861248

約数和(自身を除く): 26462428

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 67, 130, 134, 260, 268, 335, 670, 871, 1171, 1340, 1742, 2342, 3484, 4355, 4684, 5855, 8710, 11710, 15223, 17420, 23420, 30446, 60892, 76115, 78457, 152230, 156914, 304460, 313828, 392285, 784570, 1019941, 1569140, 2039882, 4079764, 5099705, 10199410, 20398820]

約数ペア:

[(1, 20398820), (2, 10199410), (4, 5099705), (5, 4079764), (10, 2039882), (13, 1569140), (20, 1019941), (26, 784570), (52, 392285), (65, 313828), (67, 304460), (130, 156914), (134, 152230), (260, 78457), (268, 76115), (335, 60892), (670, 30446), (871, 23420), (1171, 17420), (1340, 15223), (1742, 11710), (2342, 8710), (3484, 5855), (4355, 4684)]