21396060

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{16981}}^1$

素因数の和:17003

約数の個数: 72

約数和(自身を含む): 74177376

約数和(自身を除く): 52781316

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 16981, 33962, 50943, 67924, 84905, 101886, 118867, 152829, 169810, 203772, 237734, 254715, 305658, 339620, 356601, 475468, 509430, 594335, 611316, 713202, 764145, 1018860, 1069803, 1188670, 1426404, 1528290, 1783005, 2139606, 2377340, 3056580, 3566010, 4279212, 5349015, 7132020, 10698030, 21396060]

約数ペア:

[(1, 21396060), (2, 10698030), (3, 7132020), (4, 5349015), (5, 4279212), (6, 3566010), (7, 3056580), (9, 2377340), (10, 2139606), (12, 1783005), (14, 1528290), (15, 1426404), (18, 1188670), (20, 1069803), (21, 1018860), (28, 764145), (30, 713202), (35, 611316), (36, 594335), (42, 509430), (45, 475468), (60, 356601), (63, 339620), (70, 305658), (84, 254715), (90, 237734), (105, 203772), (126, 169810), (140, 152829), (180, 118867), (210, 101886), (252, 84905), (315, 67924), (420, 50943), (630, 33962), (1260, 16981)]