16181720

素因数分解:

$2^3\times 5^1\times {\mathrm{397}}^1\times {\mathrm{1019}}^1$

素因数の和:1427

約数の個数: 32

約数和(自身を含む): 36536400

約数和(自身を除く): 20354680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 397, 794, 1019, 1588, 1985, 2038, 3176, 3970, 4076, 5095, 7940, 8152, 10190, 15880, 20380, 40760, 404543, 809086, 1618172, 2022715, 3236344, 4045430, 8090860, 16181720]

約数ペア:

[(1, 16181720), (2, 8090860), (4, 4045430), (5, 3236344), (8, 2022715), (10, 1618172), (20, 809086), (40, 404543), (397, 40760), (794, 20380), (1019, 15880), (1588, 10190), (1985, 8152), (2038, 7940), (3176, 5095), (3970, 4076)]