212121720

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{197}}^1\times {\mathrm{997}}^1$

素因数の和:1214

約数の個数: 128

約数和(自身を含む): 711374400

約数和(自身を除く): 499252680

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 40, 45, 54, 60, 72, 90, 108, 120, 135, 180, 197, 216, 270, 360, 394, 540, 591, 788, 985, 997, 1080, 1182, 1576, 1773, 1970, 1994, 2364, 2955, 2991, 3546, 3940, 3988, 4728, 4985, 5319, 5910, 5982, 7092, 7880, 7976, 8865, 8973, 9970, 10638, 11820, 11964, 14184, 14955, 17730, 17946, 19940, 21276, 23640, 23928, 26595, 26919, 29910, 35460, 35892, 39880, 42552, 44865, 53190, 53838, 59820, 70920, 71784, 89730, 106380, 107676, 119640, 134595, 179460, 196409, 212760, 215352, 269190, 358920, 392818, 538380, 589227, 785636, 982045, 1076760, 1178454, 1571272, 1767681, 1964090, 2356908, 2946135, 3535362, 3928180, 4713816, 5303043, 5892270, 7070724, 7856360, 8838405, 10606086, 11784540, 14141448, 17676810, 21212172, 23569080, 26515215, 35353620, 42424344, 53030430, 70707240, 106060860, 212121720]

約数ペア:

[(1, 212121720), (2, 106060860), (3, 70707240), (4, 53030430), (5, 42424344), (6, 35353620), (8, 26515215), (9, 23569080), (10, 21212172), (12, 17676810), (15, 14141448), (18, 11784540), (20, 10606086), (24, 8838405), (27, 7856360), (30, 7070724), (36, 5892270), (40, 5303043), (45, 4713816), (54, 3928180), (60, 3535362), (72, 2946135), (90, 2356908), (108, 1964090), (120, 1767681), (135, 1571272), (180, 1178454), (197, 1076760), (216, 982045), (270, 785636), (360, 589227), (394, 538380), (540, 392818), (591, 358920), (788, 269190), (985, 215352), (997, 212760), (1080, 196409), (1182, 179460), (1576, 134595), (1773, 119640), (1970, 107676), (1994, 106380), (2364, 89730), (2955, 71784), (2991, 70920), (3546, 59820), (3940, 53838), (3988, 53190), (4728, 44865), (4985, 42552), (5319, 39880), (5910, 35892), (5982, 35460), (7092, 29910), (7880, 26919), (7976, 26595), (8865, 23928), (8973, 23640), (9970, 21276), (10638, 19940), (11820, 17946), (11964, 17730), (14184, 14955)]