19987760

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19219}}^1$

素因数の和:19245

約数の個数: 40

約数和(自身を含む): 50048880

約数和(自身を除く): 30061120

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 19219, 38438, 76876, 96095, 153752, 192190, 249847, 307504, 384380, 499694, 768760, 999388, 1249235, 1537520, 1998776, 2498470, 3997552, 4996940, 9993880, 19987760]

約数ペア:

[(1, 19987760), (2, 9993880), (4, 4996940), (5, 3997552), (8, 2498470), (10, 1998776), (13, 1537520), (16, 1249235), (20, 999388), (26, 768760), (40, 499694), (52, 384380), (65, 307504), (80, 249847), (104, 192190), (130, 153752), (208, 96095), (260, 76876), (520, 38438), (1040, 19219)]