81198440

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{28591}}^1$

素因数の和:28673

約数の個数: 32

約数和(自身を含む): 185276160

約数和(自身を除く): 104077720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 28591, 57182, 114364, 142955, 228728, 285910, 571820, 1143640, 2029961, 4059922, 8119844, 10149805, 16239688, 20299610, 40599220, 81198440]

約数ペア:

[(1, 81198440), (2, 40599220), (4, 20299610), (5, 16239688), (8, 10149805), (10, 8119844), (20, 4059922), (40, 2029961), (71, 1143640), (142, 571820), (284, 285910), (355, 228728), (568, 142955), (710, 114364), (1420, 57182), (2840, 28591)]