13155980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{389}}^1$

素因数の和:506

約数の個数: 48

約数和(自身を含む): 29484000

約数和(自身を除く): 16328020

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 89, 95, 178, 190, 356, 380, 389, 445, 778, 890, 1556, 1691, 1780, 1945, 3382, 3890, 6764, 7391, 7780, 8455, 14782, 16910, 29564, 33820, 34621, 36955, 69242, 73910, 138484, 147820, 173105, 346210, 657799, 692420, 1315598, 2631196, 3288995, 6577990, 13155980]

約数ペア:

[(1, 13155980), (2, 6577990), (4, 3288995), (5, 2631196), (10, 1315598), (19, 692420), (20, 657799), (38, 346210), (76, 173105), (89, 147820), (95, 138484), (178, 73910), (190, 69242), (356, 36955), (380, 34621), (389, 33820), (445, 29564), (778, 16910), (890, 14782), (1556, 8455), (1691, 7780), (1780, 7391), (1945, 6764), (3382, 3890)]