19890090

素因数分解:

$2^1\times 3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{181}}^1$

素因数の和:245

約数の個数: 128

約数和(自身を含む): 59754240

約数和(自身を除く): 39864150

約数列:

[1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 27, 30, 33, 37, 45, 54, 55, 66, 74, 90, 99, 110, 111, 135, 165, 181, 185, 198, 222, 270, 297, 330, 333, 362, 370, 407, 495, 543, 555, 594, 666, 814, 905, 990, 999, 1086, 1110, 1221, 1485, 1629, 1665, 1810, 1991, 1998, 2035, 2442, 2715, 2970, 3258, 3330, 3663, 3982, 4070, 4887, 4995, 5430, 5973, 6105, 6697, 7326, 8145, 9774, 9955, 9990, 10989, 11946, 12210, 13394, 16290, 17919, 18315, 19910, 20091, 21978, 24435, 29865, 33485, 35838, 36630, 40182, 48870, 53757, 54945, 59730, 60273, 66970, 73667, 89595, 100455, 107514, 109890, 120546, 147334, 179190, 180819, 200910, 221001, 268785, 301365, 361638, 368335, 442002, 537570, 602730, 663003, 736670, 904095, 1105005, 1326006, 1808190, 1989009, 2210010, 3315015, 3978018, 6630030, 9945045, 19890090]

約数ペア:

[(1, 19890090), (2, 9945045), (3, 6630030), (5, 3978018), (6, 3315015), (9, 2210010), (10, 1989009), (11, 1808190), (15, 1326006), (18, 1105005), (22, 904095), (27, 736670), (30, 663003), (33, 602730), (37, 537570), (45, 442002), (54, 368335), (55, 361638), (66, 301365), (74, 268785), (90, 221001), (99, 200910), (110, 180819), (111, 179190), (135, 147334), (165, 120546), (181, 109890), (185, 107514), (198, 100455), (222, 89595), (270, 73667), (297, 66970), (330, 60273), (333, 59730), (362, 54945), (370, 53757), (407, 48870), (495, 40182), (543, 36630), (555, 35838), (594, 33485), (666, 29865), (814, 24435), (905, 21978), (990, 20091), (999, 19910), (1086, 18315), (1110, 17919), (1221, 16290), (1485, 13394), (1629, 12210), (1665, 11946), (1810, 10989), (1991, 9990), (1998, 9955), (2035, 9774), (2442, 8145), (2715, 7326), (2970, 6697), (3258, 6105), (3330, 5973), (3663, 5430), (3982, 4995), (4070, 4887)]