638853838

素因数分解:

$2^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{20023}}^1$

素因数の和:20128

約数の個数: 32

約数和(自身を含む): 1141848576

約数和(自身を除く): 502994738

約数列:

[1, 2, 7, 14, 43, 53, 86, 106, 301, 371, 602, 742, 2279, 4558, 15953, 20023, 31906, 40046, 140161, 280322, 860989, 1061219, 1721978, 2122438, 6026923, 7428533, 12053846, 14857066, 45632417, 91264834, 319426919, 638853838]

約数ペア:

[(1, 638853838), (2, 319426919), (7, 91264834), (14, 45632417), (43, 14857066), (53, 12053846), (86, 7428533), (106, 6026923), (301, 2122438), (371, 1721978), (602, 1061219), (742, 860989), (2279, 280322), (4558, 140161), (15953, 40046), (20023, 31906)]