20120720

素因数分解:

$2^4\times 5^1\times {\mathrm{163}}^1\times {\mathrm{1543}}^1$

素因数の和:1719

約数の個数: 40

約数和(自身を含む): 47098176

約数和(自身を除く): 26977456

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 163, 326, 652, 815, 1304, 1543, 1630, 2608, 3086, 3260, 6172, 6520, 7715, 12344, 13040, 15430, 24688, 30860, 61720, 123440, 251509, 503018, 1006036, 1257545, 2012072, 2515090, 4024144, 5030180, 10060360, 20120720]

約数ペア:

[(1, 20120720), (2, 10060360), (4, 5030180), (5, 4024144), (8, 2515090), (10, 2012072), (16, 1257545), (20, 1006036), (40, 503018), (80, 251509), (163, 123440), (326, 61720), (652, 30860), (815, 24688), (1304, 15430), (1543, 13040), (1630, 12344), (2608, 7715), (3086, 6520), (3260, 6172)]