18211440

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{449}}^1$

素因数の和:491

約数の個数: 120

約数和(自身を含む): 61268400

約数和(自身を除く): 43056960

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 39, 40, 48, 52, 60, 65, 78, 80, 104, 120, 130, 156, 169, 195, 208, 240, 260, 312, 338, 390, 449, 507, 520, 624, 676, 780, 845, 898, 1014, 1040, 1347, 1352, 1560, 1690, 1796, 2028, 2245, 2535, 2694, 2704, 3120, 3380, 3592, 4056, 4490, 5070, 5388, 5837, 6735, 6760, 7184, 8112, 8980, 10140, 10776, 11674, 13470, 13520, 17511, 17960, 20280, 21552, 23348, 26940, 29185, 35022, 35920, 40560, 46696, 53880, 58370, 70044, 75881, 87555, 93392, 107760, 116740, 140088, 151762, 175110, 227643, 233480, 280176, 303524, 350220, 379405, 455286, 466960, 607048, 700440, 758810, 910572, 1138215, 1214096, 1400880, 1517620, 1821144, 2276430, 3035240, 3642288, 4552860, 6070480, 9105720, 18211440]

約数ペア:

[(1, 18211440), (2, 9105720), (3, 6070480), (4, 4552860), (5, 3642288), (6, 3035240), (8, 2276430), (10, 1821144), (12, 1517620), (13, 1400880), (15, 1214096), (16, 1138215), (20, 910572), (24, 758810), (26, 700440), (30, 607048), (39, 466960), (40, 455286), (48, 379405), (52, 350220), (60, 303524), (65, 280176), (78, 233480), (80, 227643), (104, 175110), (120, 151762), (130, 140088), (156, 116740), (169, 107760), (195, 93392), (208, 87555), (240, 75881), (260, 70044), (312, 58370), (338, 53880), (390, 46696), (449, 40560), (507, 35920), (520, 35022), (624, 29185), (676, 26940), (780, 23348), (845, 21552), (898, 20280), (1014, 17960), (1040, 17511), (1347, 13520), (1352, 13470), (1560, 11674), (1690, 10776), (1796, 10140), (2028, 8980), (2245, 8112), (2535, 7184), (2694, 6760), (2704, 6735), (3120, 5837), (3380, 5388), (3592, 5070), (4056, 4490)]