25208120

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{197}}^1\times {\mathrm{457}}^1$

素因数の和:672

約数の個数: 64

約数和(自身を含む): 65292480

約数和(自身を除く): 40084360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 197, 280, 394, 457, 788, 914, 985, 1379, 1576, 1828, 1970, 2285, 2758, 3199, 3656, 3940, 4570, 5516, 6398, 6895, 7880, 9140, 11032, 12796, 13790, 15995, 18280, 25592, 27580, 31990, 55160, 63980, 90029, 127960, 180058, 360116, 450145, 630203, 720232, 900290, 1260406, 1800580, 2520812, 3151015, 3601160, 5041624, 6302030, 12604060, 25208120]

約数ペア:

[(1, 25208120), (2, 12604060), (4, 6302030), (5, 5041624), (7, 3601160), (8, 3151015), (10, 2520812), (14, 1800580), (20, 1260406), (28, 900290), (35, 720232), (40, 630203), (56, 450145), (70, 360116), (140, 180058), (197, 127960), (280, 90029), (394, 63980), (457, 55160), (788, 31990), (914, 27580), (985, 25592), (1379, 18280), (1576, 15995), (1828, 13790), (1970, 12796), (2285, 11032), (2758, 9140), (3199, 7880), (3656, 6895), (3940, 6398), (4570, 5516)]