21939890

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{197}}^1$

素因数の和:291

約数の個数: 64

約数和(自身を含む): 47672064

約数和(自身を除く): 25732174

約数列:

[1, 2, 5, 7, 10, 14, 35, 37, 43, 70, 74, 86, 185, 197, 215, 259, 301, 370, 394, 430, 518, 602, 985, 1295, 1379, 1505, 1591, 1970, 2590, 2758, 3010, 3182, 6895, 7289, 7955, 8471, 11137, 13790, 14578, 15910, 16942, 22274, 36445, 42355, 51023, 55685, 59297, 72890, 84710, 102046, 111370, 118594, 255115, 296485, 313427, 510230, 592970, 626854, 1567135, 2193989, 3134270, 4387978, 10969945, 21939890]

約数ペア:

[(1, 21939890), (2, 10969945), (5, 4387978), (7, 3134270), (10, 2193989), (14, 1567135), (35, 626854), (37, 592970), (43, 510230), (70, 313427), (74, 296485), (86, 255115), (185, 118594), (197, 111370), (215, 102046), (259, 84710), (301, 72890), (370, 59297), (394, 55685), (430, 51023), (518, 42355), (602, 36445), (985, 22274), (1295, 16942), (1379, 15910), (1505, 14578), (1591, 13790), (1970, 11137), (2590, 8471), (2758, 7955), (3010, 7289), (3182, 6895)]