19880560

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{271}}^1$

素因数の和:422

約数の個数: 80

約数和(自身を含む): 53425152

約数和(自身を除く): 33544592

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 131, 140, 262, 271, 280, 524, 542, 560, 655, 917, 1048, 1084, 1310, 1355, 1834, 1897, 2096, 2168, 2620, 2710, 3668, 3794, 4336, 4585, 5240, 5420, 7336, 7588, 9170, 9485, 10480, 10840, 14672, 15176, 18340, 18970, 21680, 30352, 35501, 36680, 37940, 71002, 73360, 75880, 142004, 151760, 177505, 248507, 284008, 355010, 497014, 568016, 710020, 994028, 1242535, 1420040, 1988056, 2485070, 2840080, 3976112, 4970140, 9940280, 19880560]

約数ペア:

[(1, 19880560), (2, 9940280), (4, 4970140), (5, 3976112), (7, 2840080), (8, 2485070), (10, 1988056), (14, 1420040), (16, 1242535), (20, 994028), (28, 710020), (35, 568016), (40, 497014), (56, 355010), (70, 284008), (80, 248507), (112, 177505), (131, 151760), (140, 142004), (262, 75880), (271, 73360), (280, 71002), (524, 37940), (542, 36680), (560, 35501), (655, 30352), (917, 21680), (1048, 18970), (1084, 18340), (1310, 15176), (1355, 14672), (1834, 10840), (1897, 10480), (2096, 9485), (2168, 9170), (2620, 7588), (2710, 7336), (3668, 5420), (3794, 5240), (4336, 4585)]