21620320

素因数分解:

$2^5\times 5^1\times {\mathrm{163}}^1\times {\mathrm{829}}^1$

素因数の和:1007

約数の個数: 48

約数和(自身を含む): 51453360

約数和(自身を除く): 29833040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 163, 326, 652, 815, 829, 1304, 1630, 1658, 2608, 3260, 3316, 4145, 5216, 6520, 6632, 8290, 13040, 13264, 16580, 26080, 26528, 33160, 66320, 132640, 135127, 270254, 540508, 675635, 1081016, 1351270, 2162032, 2702540, 4324064, 5405080, 10810160, 21620320]

約数ペア:

[(1, 21620320), (2, 10810160), (4, 5405080), (5, 4324064), (8, 2702540), (10, 2162032), (16, 1351270), (20, 1081016), (32, 675635), (40, 540508), (80, 270254), (160, 135127), (163, 132640), (326, 66320), (652, 33160), (815, 26528), (829, 26080), (1304, 16580), (1630, 13264), (1658, 13040), (2608, 8290), (3260, 6632), (3316, 6520), (4145, 5216)]