81057860

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{4391}}^1$

素因数の和:4484

約数の個数: 48

約数和(自身を含む): 185939712

約数和(自身を除く): 104881852

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 71, 130, 142, 260, 284, 355, 710, 923, 1420, 1846, 3692, 4391, 4615, 8782, 9230, 17564, 18460, 21955, 43910, 57083, 87820, 114166, 228332, 285415, 311761, 570830, 623522, 1141660, 1247044, 1558805, 3117610, 4052893, 6235220, 8105786, 16211572, 20264465, 40528930, 81057860]

約数ペア:

[(1, 81057860), (2, 40528930), (4, 20264465), (5, 16211572), (10, 8105786), (13, 6235220), (20, 4052893), (26, 3117610), (52, 1558805), (65, 1247044), (71, 1141660), (130, 623522), (142, 570830), (260, 311761), (284, 285415), (355, 228332), (710, 114166), (923, 87820), (1420, 57083), (1846, 43910), (3692, 21955), (4391, 18460), (4615, 17564), (8782, 9230)]