278629123960

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{991}}^1\times {\mathrm{638999}}^1$

素因数の和:640012

約数の個数: 64

約数和(自身を含む): 684599040000

約数和(自身を除く): 405969916040

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 991, 1982, 3964, 4955, 7928, 9910, 10901, 19820, 21802, 39640, 43604, 54505, 87208, 109010, 218020, 436040, 638999, 1277998, 2555996, 3194995, 5111992, 6389990, 7028989, 12779980, 14057978, 25559960, 28115956, 35144945, 56231912, 70289890, 140579780, 281159560, 633248009, 1266496018, 2532992036, 3166240045, 5065984072, 6332480090, 6965728099, 12664960180, 13931456198, 25329920360, 27862912396, 34828640495, 55725824792, 69657280990, 139314561980, 278629123960]

約数ペア:

[(1, 278629123960), (2, 139314561980), (4, 69657280990), (5, 55725824792), (8, 34828640495), (10, 27862912396), (11, 25329920360), (20, 13931456198), (22, 12664960180), (40, 6965728099), (44, 6332480090), (55, 5065984072), (88, 3166240045), (110, 2532992036), (220, 1266496018), (440, 633248009), (991, 281159560), (1982, 140579780), (3964, 70289890), (4955, 56231912), (7928, 35144945), (9910, 28115956), (10901, 25559960), (19820, 14057978), (21802, 12779980), (39640, 7028989), (43604, 6389990), (54505, 5111992), (87208, 3194995), (109010, 2555996), (218020, 1277998), (436040, 638999)]