21553875

素因数分解:

$3^2\times 5^3\times 7^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1$

素因数の和:75

約数の個数: 144

約数和(自身を含む): 49937472

約数和(自身を除く): 28383597

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 23, 25, 35, 45, 49, 51, 63, 69, 75, 85, 105, 115, 119, 125, 147, 153, 161, 175, 207, 225, 245, 255, 315, 345, 357, 375, 391, 425, 441, 483, 525, 575, 595, 735, 765, 805, 833, 875, 1035, 1071, 1125, 1127, 1173, 1225, 1275, 1449, 1575, 1725, 1785, 1955, 2125, 2205, 2415, 2499, 2625, 2737, 2875, 2975, 3381, 3519, 3675, 3825, 4025, 4165, 5175, 5355, 5635, 5865, 6125, 6375, 7245, 7497, 7875, 8211, 8625, 8925, 9775, 10143, 11025, 12075, 12495, 13685, 14875, 16905, 17595, 18375, 19125, 19159, 20125, 20825, 24633, 25875, 26775, 28175, 29325, 36225, 37485, 41055, 44625, 48875, 50715, 55125, 57477, 60375, 62475, 68425, 84525, 87975, 95795, 104125, 123165, 133875, 140875, 146625, 172431, 181125, 187425, 205275, 253575, 287385, 312375, 342125, 422625, 439875, 478975, 615825, 862155, 937125, 1026375, 1267875, 1436925, 2394875, 3079125, 4310775, 7184625, 21553875]

約数ペア:

[(1, 21553875), (3, 7184625), (5, 4310775), (7, 3079125), (9, 2394875), (15, 1436925), (17, 1267875), (21, 1026375), (23, 937125), (25, 862155), (35, 615825), (45, 478975), (49, 439875), (51, 422625), (63, 342125), (69, 312375), (75, 287385), (85, 253575), (105, 205275), (115, 187425), (119, 181125), (125, 172431), (147, 146625), (153, 140875), (161, 133875), (175, 123165), (207, 104125), (225, 95795), (245, 87975), (255, 84525), (315, 68425), (345, 62475), (357, 60375), (375, 57477), (391, 55125), (425, 50715), (441, 48875), (483, 44625), (525, 41055), (575, 37485), (595, 36225), (735, 29325), (765, 28175), (805, 26775), (833, 25875), (875, 24633), (1035, 20825), (1071, 20125), (1125, 19159), (1127, 19125), (1173, 18375), (1225, 17595), (1275, 16905), (1449, 14875), (1575, 13685), (1725, 12495), (1785, 12075), (1955, 11025), (2125, 10143), (2205, 9775), (2415, 8925), (2499, 8625), (2625, 8211), (2737, 7875), (2875, 7497), (2975, 7245), (3381, 6375), (3519, 6125), (3675, 5865), (3825, 5635), (4025, 5355), (4165, 5175)]