20640659000

素因数分解:

$2^3\times 5^3\times {\mathrm{13}}^1\times {\mathrm{1587743}}^1$

素因数の和:1587777

約数の個数: 64

約数和(自身を含む): 52014493440

約数和(自身を除く): 31373834440

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 65, 100, 104, 125, 130, 200, 250, 260, 325, 500, 520, 650, 1000, 1300, 1625, 2600, 3250, 6500, 13000, 1587743, 3175486, 6350972, 7938715, 12701944, 15877430, 20640659, 31754860, 39693575, 41281318, 63509720, 79387150, 82562636, 103203295, 158774300, 165125272, 198467875, 206406590, 317548600, 396935750, 412813180, 516016475, 793871500, 825626360, 1032032950, 1587743000, 2064065900, 2580082375, 4128131800, 5160164750, 10320329500, 20640659000]

約数ペア:

[(1, 20640659000), (2, 10320329500), (4, 5160164750), (5, 4128131800), (8, 2580082375), (10, 2064065900), (13, 1587743000), (20, 1032032950), (25, 825626360), (26, 793871500), (40, 516016475), (50, 412813180), (52, 396935750), (65, 317548600), (100, 206406590), (104, 198467875), (125, 165125272), (130, 158774300), (200, 103203295), (250, 82562636), (260, 79387150), (325, 63509720), (500, 41281318), (520, 39693575), (650, 31754860), (1000, 20640659), (1300, 15877430), (1625, 12701944), (2600, 7938715), (3250, 6350972), (6500, 3175486), (13000, 1587743)]