21131760

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{521}}^1$

素因数の和:563

約数の個数: 120

約数和(自身を含む): 71071344

約数和(自身を除く): 49939584

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 39, 40, 48, 52, 60, 65, 78, 80, 104, 120, 130, 156, 169, 195, 208, 240, 260, 312, 338, 390, 507, 520, 521, 624, 676, 780, 845, 1014, 1040, 1042, 1352, 1560, 1563, 1690, 2028, 2084, 2535, 2605, 2704, 3120, 3126, 3380, 4056, 4168, 5070, 5210, 6252, 6760, 6773, 7815, 8112, 8336, 10140, 10420, 12504, 13520, 13546, 15630, 20280, 20319, 20840, 25008, 27092, 31260, 33865, 40560, 40638, 41680, 54184, 62520, 67730, 81276, 88049, 101595, 108368, 125040, 135460, 162552, 176098, 203190, 264147, 270920, 325104, 352196, 406380, 440245, 528294, 541840, 704392, 812760, 880490, 1056588, 1320735, 1408784, 1625520, 1760980, 2113176, 2641470, 3521960, 4226352, 5282940, 7043920, 10565880, 21131760]

約数ペア:

[(1, 21131760), (2, 10565880), (3, 7043920), (4, 5282940), (5, 4226352), (6, 3521960), (8, 2641470), (10, 2113176), (12, 1760980), (13, 1625520), (15, 1408784), (16, 1320735), (20, 1056588), (24, 880490), (26, 812760), (30, 704392), (39, 541840), (40, 528294), (48, 440245), (52, 406380), (60, 352196), (65, 325104), (78, 270920), (80, 264147), (104, 203190), (120, 176098), (130, 162552), (156, 135460), (169, 125040), (195, 108368), (208, 101595), (240, 88049), (260, 81276), (312, 67730), (338, 62520), (390, 54184), (507, 41680), (520, 40638), (521, 40560), (624, 33865), (676, 31260), (780, 27092), (845, 25008), (1014, 20840), (1040, 20319), (1042, 20280), (1352, 15630), (1560, 13546), (1563, 13520), (1690, 12504), (2028, 10420), (2084, 10140), (2535, 8336), (2605, 8112), (2704, 7815), (3120, 6773), (3126, 6760), (3380, 6252), (4056, 5210), (4168, 5070)]