21739180

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{103}}^1\times {\mathrm{173}}^1$

素因数の和:346

約数の個数: 48

約数和(自身を含む): 47121984

約数和(自身を除く): 25382804

約数列:

[1, 2, 4, 5, 10, 20, 61, 103, 122, 173, 206, 244, 305, 346, 412, 515, 610, 692, 865, 1030, 1220, 1730, 2060, 3460, 6283, 10553, 12566, 17819, 21106, 25132, 31415, 35638, 42212, 52765, 62830, 71276, 89095, 105530, 125660, 178190, 211060, 356380, 1086959, 2173918, 4347836, 5434795, 10869590, 21739180]

約数ペア:

[(1, 21739180), (2, 10869590), (4, 5434795), (5, 4347836), (10, 2173918), (20, 1086959), (61, 356380), (103, 211060), (122, 178190), (173, 125660), (206, 105530), (244, 89095), (305, 71276), (346, 62830), (412, 52765), (515, 42212), (610, 35638), (692, 31415), (865, 25132), (1030, 21106), (1220, 17819), (1730, 12566), (2060, 10553), (3460, 6283)]