21240144

素因数分解:

$2^4\times 3^7\times {\mathrm{607}}^1$

素因数の和:636

約数の個数: 80

約数和(自身を含む): 61821440

約数和(自身を除く): 40581296

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 27, 36, 48, 54, 72, 81, 108, 144, 162, 216, 243, 324, 432, 486, 607, 648, 729, 972, 1214, 1296, 1458, 1821, 1944, 2187, 2428, 2916, 3642, 3888, 4374, 4856, 5463, 5832, 7284, 8748, 9712, 10926, 11664, 14568, 16389, 17496, 21852, 29136, 32778, 34992, 43704, 49167, 65556, 87408, 98334, 131112, 147501, 196668, 262224, 295002, 393336, 442503, 590004, 786672, 885006, 1180008, 1327509, 1770012, 2360016, 2655018, 3540024, 5310036, 7080048, 10620072, 21240144]

約数ペア:

[(1, 21240144), (2, 10620072), (3, 7080048), (4, 5310036), (6, 3540024), (8, 2655018), (9, 2360016), (12, 1770012), (16, 1327509), (18, 1180008), (24, 885006), (27, 786672), (36, 590004), (48, 442503), (54, 393336), (72, 295002), (81, 262224), (108, 196668), (144, 147501), (162, 131112), (216, 98334), (243, 87408), (324, 65556), (432, 49167), (486, 43704), (607, 34992), (648, 32778), (729, 29136), (972, 21852), (1214, 17496), (1296, 16389), (1458, 14568), (1821, 11664), (1944, 10926), (2187, 9712), (2428, 8748), (2916, 7284), (3642, 5832), (3888, 5463), (4374, 4856)]