21541380

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{431}}^1$

素因数の和:474

約数の個数: 144

約数和(自身を含む): 74462976

約数和(自身を除く): 52921596

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 17, 20, 21, 28, 30, 34, 35, 42, 49, 51, 60, 68, 70, 84, 85, 98, 102, 105, 119, 140, 147, 170, 196, 204, 210, 238, 245, 255, 294, 340, 357, 420, 431, 476, 490, 510, 588, 595, 714, 735, 833, 862, 980, 1020, 1190, 1293, 1428, 1470, 1666, 1724, 1785, 2155, 2380, 2499, 2586, 2940, 3017, 3332, 3570, 4165, 4310, 4998, 5172, 6034, 6465, 7140, 7327, 8330, 8620, 9051, 9996, 12068, 12495, 12930, 14654, 15085, 16660, 18102, 21119, 21981, 24990, 25860, 29308, 30170, 36204, 36635, 42238, 43962, 45255, 49980, 51289, 60340, 63357, 73270, 84476, 87924, 90510, 102578, 105595, 109905, 126714, 146540, 153867, 181020, 205156, 211190, 219810, 253428, 256445, 307734, 316785, 359023, 422380, 439620, 512890, 615468, 633570, 718046, 769335, 1025780, 1077069, 1267140, 1436092, 1538670, 1795115, 2154138, 3077340, 3590230, 4308276, 5385345, 7180460, 10770690, 21541380]

約数ペア:

[(1, 21541380), (2, 10770690), (3, 7180460), (4, 5385345), (5, 4308276), (6, 3590230), (7, 3077340), (10, 2154138), (12, 1795115), (14, 1538670), (15, 1436092), (17, 1267140), (20, 1077069), (21, 1025780), (28, 769335), (30, 718046), (34, 633570), (35, 615468), (42, 512890), (49, 439620), (51, 422380), (60, 359023), (68, 316785), (70, 307734), (84, 256445), (85, 253428), (98, 219810), (102, 211190), (105, 205156), (119, 181020), (140, 153867), (147, 146540), (170, 126714), (196, 109905), (204, 105595), (210, 102578), (238, 90510), (245, 87924), (255, 84476), (294, 73270), (340, 63357), (357, 60340), (420, 51289), (431, 49980), (476, 45255), (490, 43962), (510, 42238), (588, 36635), (595, 36204), (714, 30170), (735, 29308), (833, 25860), (862, 24990), (980, 21981), (1020, 21119), (1190, 18102), (1293, 16660), (1428, 15085), (1470, 14654), (1666, 12930), (1724, 12495), (1785, 12068), (2155, 9996), (2380, 9051), (2499, 8620), (2586, 8330), (2940, 7327), (3017, 7140), (3332, 6465), (3570, 6034), (4165, 5172), (4310, 4998)]