21439860

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{27487}}^1$

素因数の和:27512

約数の個数: 48

約数和(自身を含む): 64651776

約数和(自身を除く): 43211916

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 27487, 54974, 82461, 109948, 137435, 164922, 274870, 329844, 357331, 412305, 549740, 714662, 824610, 1071993, 1429324, 1649220, 1786655, 2143986, 3573310, 4287972, 5359965, 7146620, 10719930, 21439860]

約数ペア:

[(1, 21439860), (2, 10719930), (3, 7146620), (4, 5359965), (5, 4287972), (6, 3573310), (10, 2143986), (12, 1786655), (13, 1649220), (15, 1429324), (20, 1071993), (26, 824610), (30, 714662), (39, 549740), (52, 412305), (60, 357331), (65, 329844), (78, 274870), (130, 164922), (156, 137435), (195, 109948), (260, 82461), (390, 54974), (780, 27487)]