21878320

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{16087}}^1$

素因数の和:16117

約数の個数: 40

約数和(自身を含む): 53862624

約数和(自身を除く): 31984304

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 16087, 32174, 64348, 80435, 128696, 160870, 257392, 273479, 321740, 546958, 643480, 1093916, 1286960, 1367395, 2187832, 2734790, 4375664, 5469580, 10939160, 21878320]

約数ペア:

[(1, 21878320), (2, 10939160), (4, 5469580), (5, 4375664), (8, 2734790), (10, 2187832), (16, 1367395), (17, 1286960), (20, 1093916), (34, 643480), (40, 546958), (68, 321740), (80, 273479), (85, 257392), (136, 160870), (170, 128696), (272, 80435), (340, 64348), (680, 32174), (1360, 16087)]