21645080

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{229}}^1$

素因数の和:396

約数の個数: 64

約数和(自身を含む): 52164000

約数和(自身を除く): 30518920

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 139, 170, 229, 278, 340, 458, 556, 680, 695, 916, 1112, 1145, 1390, 1832, 2290, 2363, 2780, 3893, 4580, 4726, 5560, 7786, 9160, 9452, 11815, 15572, 18904, 19465, 23630, 31144, 31831, 38930, 47260, 63662, 77860, 94520, 127324, 155720, 159155, 254648, 318310, 541127, 636620, 1082254, 1273240, 2164508, 2705635, 4329016, 5411270, 10822540, 21645080]

約数ペア:

[(1, 21645080), (2, 10822540), (4, 5411270), (5, 4329016), (8, 2705635), (10, 2164508), (17, 1273240), (20, 1082254), (34, 636620), (40, 541127), (68, 318310), (85, 254648), (136, 159155), (139, 155720), (170, 127324), (229, 94520), (278, 77860), (340, 63662), (458, 47260), (556, 38930), (680, 31831), (695, 31144), (916, 23630), (1112, 19465), (1145, 18904), (1390, 15572), (1832, 11815), (2290, 9452), (2363, 9160), (2780, 7786), (3893, 5560), (4580, 4726)]