19970900

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{457}}^1$

素因数の和:513

約数の個数: 72

約数和(自身を含む): 47705280

約数和(自身を除く): 27734380

約数列:

[1, 2, 4, 5, 10, 19, 20, 23, 25, 38, 46, 50, 76, 92, 95, 100, 115, 190, 230, 380, 437, 457, 460, 475, 575, 874, 914, 950, 1150, 1748, 1828, 1900, 2185, 2285, 2300, 4370, 4570, 8683, 8740, 9140, 10511, 10925, 11425, 17366, 21022, 21850, 22850, 34732, 42044, 43415, 43700, 45700, 52555, 86830, 105110, 173660, 199709, 210220, 217075, 262775, 399418, 434150, 525550, 798836, 868300, 998545, 1051100, 1997090, 3994180, 4992725, 9985450, 19970900]

約数ペア:

[(1, 19970900), (2, 9985450), (4, 4992725), (5, 3994180), (10, 1997090), (19, 1051100), (20, 998545), (23, 868300), (25, 798836), (38, 525550), (46, 434150), (50, 399418), (76, 262775), (92, 217075), (95, 210220), (100, 199709), (115, 173660), (190, 105110), (230, 86830), (380, 52555), (437, 45700), (457, 43700), (460, 43415), (475, 42044), (575, 34732), (874, 22850), (914, 21850), (950, 21022), (1150, 17366), (1748, 11425), (1828, 10925), (1900, 10511), (2185, 9140), (2285, 8740), (2300, 8683), (4370, 4570)]