18516940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{229}}^1\times {\mathrm{311}}^1$

素因数の和:562

約数の個数: 48

約数和(自身を含む): 42194880

約数和(自身を除く): 23677940

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 229, 260, 311, 458, 622, 916, 1145, 1244, 1555, 2290, 2977, 3110, 4043, 4580, 5954, 6220, 8086, 11908, 14885, 16172, 20215, 29770, 40430, 59540, 71219, 80860, 142438, 284876, 356095, 712190, 925847, 1424380, 1851694, 3703388, 4629235, 9258470, 18516940]

約数ペア:

[(1, 18516940), (2, 9258470), (4, 4629235), (5, 3703388), (10, 1851694), (13, 1424380), (20, 925847), (26, 712190), (52, 356095), (65, 284876), (130, 142438), (229, 80860), (260, 71219), (311, 59540), (458, 40430), (622, 29770), (916, 20215), (1145, 16172), (1244, 14885), (1555, 11908), (2290, 8086), (2977, 6220), (3110, 5954), (4043, 4580)]