161996640

素因数分解:

$2^5\times 3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{1997}}^1$

素因数の和:2041

約数の個数: 144

約数和(自身を含む): 552838608

約数和(自身を除く): 390841968

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 32, 39, 40, 48, 52, 60, 65, 78, 80, 96, 104, 120, 130, 156, 160, 169, 195, 208, 240, 260, 312, 338, 390, 416, 480, 507, 520, 624, 676, 780, 845, 1014, 1040, 1248, 1352, 1560, 1690, 1997, 2028, 2080, 2535, 2704, 3120, 3380, 3994, 4056, 5070, 5408, 5991, 6240, 6760, 7988, 8112, 9985, 10140, 11982, 13520, 15976, 16224, 19970, 20280, 23964, 25961, 27040, 29955, 31952, 39940, 40560, 47928, 51922, 59910, 63904, 77883, 79880, 81120, 95856, 103844, 119820, 129805, 155766, 159760, 191712, 207688, 239640, 259610, 311532, 319520, 337493, 389415, 415376, 479280, 519220, 623064, 674986, 778830, 830752, 958560, 1012479, 1038440, 1246128, 1349972, 1557660, 1687465, 2024958, 2076880, 2492256, 2699944, 3115320, 3374930, 4049916, 4153760, 5062395, 5399888, 6230640, 6749860, 8099832, 10124790, 10799776, 12461280, 13499720, 16199664, 20249580, 26999440, 32399328, 40499160, 53998880, 80998320, 161996640]

約数ペア:

[(1, 161996640), (2, 80998320), (3, 53998880), (4, 40499160), (5, 32399328), (6, 26999440), (8, 20249580), (10, 16199664), (12, 13499720), (13, 12461280), (15, 10799776), (16, 10124790), (20, 8099832), (24, 6749860), (26, 6230640), (30, 5399888), (32, 5062395), (39, 4153760), (40, 4049916), (48, 3374930), (52, 3115320), (60, 2699944), (65, 2492256), (78, 2076880), (80, 2024958), (96, 1687465), (104, 1557660), (120, 1349972), (130, 1246128), (156, 1038440), (160, 1012479), (169, 958560), (195, 830752), (208, 778830), (240, 674986), (260, 623064), (312, 519220), (338, 479280), (390, 415376), (416, 389415), (480, 337493), (507, 319520), (520, 311532), (624, 259610), (676, 239640), (780, 207688), (845, 191712), (1014, 159760), (1040, 155766), (1248, 129805), (1352, 119820), (1560, 103844), (1690, 95856), (1997, 81120), (2028, 79880), (2080, 77883), (2535, 63904), (2704, 59910), (3120, 51922), (3380, 47928), (3994, 40560), (4056, 39940), (5070, 31952), (5408, 29955), (5991, 27040), (6240, 25961), (6760, 23964), (7988, 20280), (8112, 19970), (9985, 16224), (10140, 15976), (11982, 13520)]