19991192

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{151}}^1$

素因数の和:256

約数の個数: 64

約数和(自身を含む): 43411200

約数和(自身を除く): 23420008

約数列:

[1, 2, 4, 8, 13, 19, 26, 38, 52, 67, 76, 104, 134, 151, 152, 247, 268, 302, 494, 536, 604, 871, 988, 1208, 1273, 1742, 1963, 1976, 2546, 2869, 3484, 3926, 5092, 5738, 6968, 7852, 10117, 10184, 11476, 15704, 16549, 20234, 22952, 33098, 37297, 40468, 66196, 74594, 80936, 131521, 132392, 149188, 192223, 263042, 298376, 384446, 526084, 768892, 1052168, 1537784, 2498899, 4997798, 9995596, 19991192]

約数ペア:

[(1, 19991192), (2, 9995596), (4, 4997798), (8, 2498899), (13, 1537784), (19, 1052168), (26, 768892), (38, 526084), (52, 384446), (67, 298376), (76, 263042), (104, 192223), (134, 149188), (151, 132392), (152, 131521), (247, 80936), (268, 74594), (302, 66196), (494, 40468), (536, 37297), (604, 33098), (871, 22952), (988, 20234), (1208, 16549), (1273, 15704), (1742, 11476), (1963, 10184), (1976, 10117), (2546, 7852), (2869, 6968), (3484, 5738), (3926, 5092)]