20389780

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{83}}^1\times {\mathrm{173}}^1$

素因数の和:336

約数の個数: 48

約数和(自身を含む): 44198784

約数和(自身を除く): 23809004

約数列:

[1, 2, 4, 5, 10, 20, 71, 83, 142, 166, 173, 284, 332, 346, 355, 415, 692, 710, 830, 865, 1420, 1660, 1730, 3460, 5893, 11786, 12283, 14359, 23572, 24566, 28718, 29465, 49132, 57436, 58930, 61415, 71795, 117860, 122830, 143590, 245660, 287180, 1019489, 2038978, 4077956, 5097445, 10194890, 20389780]

約数ペア:

[(1, 20389780), (2, 10194890), (4, 5097445), (5, 4077956), (10, 2038978), (20, 1019489), (71, 287180), (83, 245660), (142, 143590), (166, 122830), (173, 117860), (284, 71795), (332, 61415), (346, 58930), (355, 57436), (415, 49132), (692, 29465), (710, 28718), (830, 24566), (865, 23572), (1420, 14359), (1660, 12283), (1730, 11786), (3460, 5893)]