18403420

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{89}}^1\times {\mathrm{211}}^1$

素因数の和:323

約数の個数: 72

約数和(自身を含む): 45677520

約数和(自身を除く): 27274100

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 89, 98, 140, 178, 196, 211, 245, 356, 422, 445, 490, 623, 844, 890, 980, 1055, 1246, 1477, 1780, 2110, 2492, 2954, 3115, 4220, 4361, 5908, 6230, 7385, 8722, 10339, 12460, 14770, 17444, 18779, 20678, 21805, 29540, 37558, 41356, 43610, 51695, 75116, 87220, 93895, 103390, 131453, 187790, 206780, 262906, 375580, 525812, 657265, 920171, 1314530, 1840342, 2629060, 3680684, 4600855, 9201710, 18403420]

約数ペア:

[(1, 18403420), (2, 9201710), (4, 4600855), (5, 3680684), (7, 2629060), (10, 1840342), (14, 1314530), (20, 920171), (28, 657265), (35, 525812), (49, 375580), (70, 262906), (89, 206780), (98, 187790), (140, 131453), (178, 103390), (196, 93895), (211, 87220), (245, 75116), (356, 51695), (422, 43610), (445, 41356), (490, 37558), (623, 29540), (844, 21805), (890, 20678), (980, 18779), (1055, 17444), (1246, 14770), (1477, 12460), (1780, 10339), (2110, 8722), (2492, 7385), (2954, 6230), (3115, 5908), (4220, 4361)]