19985360

素因数分解:

$2^4\times 5^1\times {\mathrm{131}}^1\times {\mathrm{1907}}^1$

素因数の和:2051

約数の個数: 40

約数和(自身を含む): 46845216

約数和(自身を除く): 26859856

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 131, 262, 524, 655, 1048, 1310, 1907, 2096, 2620, 3814, 5240, 7628, 9535, 10480, 15256, 19070, 30512, 38140, 76280, 152560, 249817, 499634, 999268, 1249085, 1998536, 2498170, 3997072, 4996340, 9992680, 19985360]

約数ペア:

[(1, 19985360), (2, 9992680), (4, 4996340), (5, 3997072), (8, 2498170), (10, 1998536), (16, 1249085), (20, 999268), (40, 499634), (80, 249817), (131, 152560), (262, 76280), (524, 38140), (655, 30512), (1048, 19070), (1310, 15256), (1907, 10480), (2096, 9535), (2620, 7628), (3814, 5240)]