19992780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{1019}}^1$

素因数の和:1143

約数の個数: 72

約数和(自身を含む): 61261200

約数和(自身を除く): 41268420

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 109, 180, 218, 327, 436, 545, 654, 981, 1019, 1090, 1308, 1635, 1962, 2038, 2180, 3057, 3270, 3924, 4076, 4905, 5095, 6114, 6540, 9171, 9810, 10190, 12228, 15285, 18342, 19620, 20380, 30570, 36684, 45855, 61140, 91710, 111071, 183420, 222142, 333213, 444284, 555355, 666426, 999639, 1110710, 1332852, 1666065, 1999278, 2221420, 3332130, 3998556, 4998195, 6664260, 9996390, 19992780]

約数ペア:

[(1, 19992780), (2, 9996390), (3, 6664260), (4, 4998195), (5, 3998556), (6, 3332130), (9, 2221420), (10, 1999278), (12, 1666065), (15, 1332852), (18, 1110710), (20, 999639), (30, 666426), (36, 555355), (45, 444284), (60, 333213), (90, 222142), (109, 183420), (180, 111071), (218, 91710), (327, 61140), (436, 45855), (545, 36684), (654, 30570), (981, 20380), (1019, 19620), (1090, 18342), (1308, 15285), (1635, 12228), (1962, 10190), (2038, 9810), (2180, 9171), (3057, 6540), (3270, 6114), (3924, 5095), (4076, 4905)]