19939660

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{1447}}^1$

素因数の和:1522

約数の個数: 48

約数和(自身を含む): 45976896

約数和(自身を除く): 26037236

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 53, 65, 106, 130, 212, 260, 265, 530, 689, 1060, 1378, 1447, 2756, 2894, 3445, 5788, 6890, 7235, 13780, 14470, 18811, 28940, 37622, 75244, 76691, 94055, 153382, 188110, 306764, 376220, 383455, 766910, 996983, 1533820, 1993966, 3987932, 4984915, 9969830, 19939660]

約数ペア:

[(1, 19939660), (2, 9969830), (4, 4984915), (5, 3987932), (10, 1993966), (13, 1533820), (20, 996983), (26, 766910), (52, 383455), (53, 376220), (65, 306764), (106, 188110), (130, 153382), (212, 94055), (260, 76691), (265, 75244), (530, 37622), (689, 28940), (1060, 18811), (1378, 14470), (1447, 13780), (2756, 7235), (2894, 6890), (3445, 5788)]