217972020

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{518981}}^1$

素因数の和:519000

約数の個数: 48

約数和(自身を含む): 697511808

約数和(自身を除く): 479539788

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 518981, 1037962, 1556943, 2075924, 2594905, 3113886, 3632867, 5189810, 6227772, 7265734, 7784715, 10379620, 10898601, 14531468, 15569430, 18164335, 21797202, 31138860, 36328670, 43594404, 54493005, 72657340, 108986010, 217972020]

約数ペア:

[(1, 217972020), (2, 108986010), (3, 72657340), (4, 54493005), (5, 43594404), (6, 36328670), (7, 31138860), (10, 21797202), (12, 18164335), (14, 15569430), (15, 14531468), (20, 10898601), (21, 10379620), (28, 7784715), (30, 7265734), (35, 6227772), (42, 5189810), (60, 3632867), (70, 3113886), (84, 2594905), (105, 2075924), (140, 1556943), (210, 1037962), (420, 518981)]