20571915

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{2153}}^1$

素因数の和:2188

約数の個数: 48

約数和(自身を含む): 41253408

約数和(自身を除く): 20681493

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 49, 65, 91, 105, 147, 195, 245, 273, 455, 637, 735, 1365, 1911, 2153, 3185, 6459, 9555, 10765, 15071, 27989, 32295, 45213, 75355, 83967, 105497, 139945, 195923, 226065, 316491, 419835, 527485, 587769, 979615, 1371461, 1582455, 2938845, 4114383, 6857305, 20571915]

約数ペア:

[(1, 20571915), (3, 6857305), (5, 4114383), (7, 2938845), (13, 1582455), (15, 1371461), (21, 979615), (35, 587769), (39, 527485), (49, 419835), (65, 316491), (91, 226065), (105, 195923), (147, 139945), (195, 105497), (245, 83967), (273, 75355), (455, 45213), (637, 32295), (735, 27989), (1365, 15071), (1911, 10765), (2153, 9555), (3185, 6459)]