19911328

素因数分解:

$2^5\times {\mathrm{37}}^1\times {\mathrm{67}}^1\times {\mathrm{251}}^1$

素因数の和:365

約数の個数: 48

約数和(自身を含む): 41023584

約数和(自身を除く): 21112256

約数列:

[1, 2, 4, 8, 16, 32, 37, 67, 74, 134, 148, 251, 268, 296, 502, 536, 592, 1004, 1072, 1184, 2008, 2144, 2479, 4016, 4958, 8032, 9287, 9916, 16817, 18574, 19832, 33634, 37148, 39664, 67268, 74296, 79328, 134536, 148592, 269072, 297184, 538144, 622229, 1244458, 2488916, 4977832, 9955664, 19911328]

約数ペア:

[(1, 19911328), (2, 9955664), (4, 4977832), (8, 2488916), (16, 1244458), (32, 622229), (37, 538144), (67, 297184), (74, 269072), (134, 148592), (148, 134536), (251, 79328), (268, 74296), (296, 67268), (502, 39664), (536, 37148), (592, 33634), (1004, 19832), (1072, 18574), (1184, 16817), (2008, 9916), (2144, 9287), (2479, 8032), (4016, 4958)]