21980720

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{14461}}^1$

素因数の和:14493

約数の個数: 40

約数和(自身を含む): 53798640

約数和(自身を除く): 31817920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 14461, 28922, 57844, 72305, 115688, 144610, 231376, 274759, 289220, 549518, 578440, 1099036, 1156880, 1373795, 2198072, 2747590, 4396144, 5495180, 10990360, 21980720]

約数ペア:

[(1, 21980720), (2, 10990360), (4, 5495180), (5, 4396144), (8, 2747590), (10, 2198072), (16, 1373795), (19, 1156880), (20, 1099036), (38, 578440), (40, 549518), (76, 289220), (80, 274759), (95, 231376), (152, 144610), (190, 115688), (304, 72305), (380, 57844), (760, 28922), (1520, 14461)]