16191220

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{281}}^1$

素因数の和:400

約数の個数: 48

約数和(自身を含む): 35437248

約数和(自身を除く): 19246028

約数列:

[1, 2, 4, 5, 10, 20, 43, 67, 86, 134, 172, 215, 268, 281, 335, 430, 562, 670, 860, 1124, 1340, 1405, 2810, 2881, 5620, 5762, 11524, 12083, 14405, 18827, 24166, 28810, 37654, 48332, 57620, 60415, 75308, 94135, 120830, 188270, 241660, 376540, 809561, 1619122, 3238244, 4047805, 8095610, 16191220]

約数ペア:

[(1, 16191220), (2, 8095610), (4, 4047805), (5, 3238244), (10, 1619122), (20, 809561), (43, 376540), (67, 241660), (86, 188270), (134, 120830), (172, 94135), (215, 75308), (268, 60415), (281, 57620), (335, 48332), (430, 37654), (562, 28810), (670, 24166), (860, 18827), (1124, 14405), (1340, 12083), (1405, 11524), (2810, 5762), (2881, 5620)]