21521878

素因数分解:

$2^1\times 7^3\times {\mathrm{137}}^1\times {\mathrm{229}}^1$

素因数の和:389

約数の個数: 32

約数和(自身を含む): 38088000

約数和(自身を除く): 16566122

約数列:

[1, 2, 7, 14, 49, 98, 137, 229, 274, 343, 458, 686, 959, 1603, 1918, 3206, 6713, 11221, 13426, 22442, 31373, 46991, 62746, 78547, 93982, 157094, 219611, 439222, 1537277, 3074554, 10760939, 21521878]

約数ペア:

[(1, 21521878), (2, 10760939), (7, 3074554), (14, 1537277), (49, 439222), (98, 219611), (137, 157094), (229, 93982), (274, 78547), (343, 62746), (458, 46991), (686, 31373), (959, 22442), (1603, 13426), (1918, 11221), (3206, 6713)]