21655710

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{3389}}^1$

素因数の和:3473

約数の個数: 48

約数和(自身を含む): 57114720

約数和(自身を除く): 35459010

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 71, 90, 142, 213, 355, 426, 639, 710, 1065, 1278, 2130, 3195, 3389, 6390, 6778, 10167, 16945, 20334, 30501, 33890, 50835, 61002, 101670, 152505, 240619, 305010, 481238, 721857, 1203095, 1443714, 2165571, 2406190, 3609285, 4331142, 7218570, 10827855, 21655710]

約数ペア:

[(1, 21655710), (2, 10827855), (3, 7218570), (5, 4331142), (6, 3609285), (9, 2406190), (10, 2165571), (15, 1443714), (18, 1203095), (30, 721857), (45, 481238), (71, 305010), (90, 240619), (142, 152505), (213, 101670), (355, 61002), (426, 50835), (639, 33890), (710, 30501), (1065, 20334), (1278, 16945), (2130, 10167), (3195, 6778), (3389, 6390)]