81018920

素因数分解:

$2^3\times 5^1\times {\mathrm{367}}^1\times {\mathrm{5519}}^1$

素因数の和:5897

約数の個数: 32

約数和(自身を含む): 182822400

約数和(自身を除く): 101803480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 367, 734, 1468, 1835, 2936, 3670, 5519, 7340, 11038, 14680, 22076, 27595, 44152, 55190, 110380, 220760, 2025473, 4050946, 8101892, 10127365, 16203784, 20254730, 40509460, 81018920]

約数ペア:

[(1, 81018920), (2, 40509460), (4, 20254730), (5, 16203784), (8, 10127365), (10, 8101892), (20, 4050946), (40, 2025473), (367, 220760), (734, 110380), (1468, 55190), (1835, 44152), (2936, 27595), (3670, 22076), (5519, 14680), (7340, 11038)]