20628320

素因数分解:

$2^5\times 5^1\times {\mathrm{229}}^1\times {\mathrm{563}}^1$

素因数の和:807

約数の個数: 48

約数和(自身を含む): 49034160

約数和(自身を除く): 28405840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 229, 458, 563, 916, 1126, 1145, 1832, 2252, 2290, 2815, 3664, 4504, 4580, 5630, 7328, 9008, 9160, 11260, 18016, 18320, 22520, 36640, 45040, 90080, 128927, 257854, 515708, 644635, 1031416, 1289270, 2062832, 2578540, 4125664, 5157080, 10314160, 20628320]

約数ペア:

[(1, 20628320), (2, 10314160), (4, 5157080), (5, 4125664), (8, 2578540), (10, 2062832), (16, 1289270), (20, 1031416), (32, 644635), (40, 515708), (80, 257854), (160, 128927), (229, 90080), (458, 45040), (563, 36640), (916, 22520), (1126, 18320), (1145, 18016), (1832, 11260), (2252, 9160), (2290, 9008), (2815, 7328), (3664, 5630), (4504, 4580)]