19992400

素因数分解:

$2^4\times 5^2\times {\mathrm{151}}^1\times {\mathrm{331}}^1$

素因数の和:500

約数の個数: 60

約数和(自身を含む): 48495904

約数和(自身を除く): 28503504

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 151, 200, 302, 331, 400, 604, 662, 755, 1208, 1324, 1510, 1655, 2416, 2648, 3020, 3310, 3775, 5296, 6040, 6620, 7550, 8275, 12080, 13240, 15100, 16550, 26480, 30200, 33100, 49981, 60400, 66200, 99962, 132400, 199924, 249905, 399848, 499810, 799696, 999620, 1249525, 1999240, 2499050, 3998480, 4998100, 9996200, 19992400]

約数ペア:

[(1, 19992400), (2, 9996200), (4, 4998100), (5, 3998480), (8, 2499050), (10, 1999240), (16, 1249525), (20, 999620), (25, 799696), (40, 499810), (50, 399848), (80, 249905), (100, 199924), (151, 132400), (200, 99962), (302, 66200), (331, 60400), (400, 49981), (604, 33100), (662, 30200), (755, 26480), (1208, 16550), (1324, 15100), (1510, 13240), (1655, 12080), (2416, 8275), (2648, 7550), (3020, 6620), (3310, 6040), (3775, 5296)]