21753328

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{163}}^1\times {\mathrm{439}}^1$

素因数の和:629

約数の個数: 40

約数和(自身を含む): 44739200

約数和(自身を除く): 22985872

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 163, 304, 326, 439, 652, 878, 1304, 1756, 2608, 3097, 3512, 6194, 7024, 8341, 12388, 16682, 24776, 33364, 49552, 66728, 71557, 133456, 143114, 286228, 572456, 1144912, 1359583, 2719166, 5438332, 10876664, 21753328]

約数ペア:

[(1, 21753328), (2, 10876664), (4, 5438332), (8, 2719166), (16, 1359583), (19, 1144912), (38, 572456), (76, 286228), (152, 143114), (163, 133456), (304, 71557), (326, 66728), (439, 49552), (652, 33364), (878, 24776), (1304, 16682), (1756, 12388), (2608, 8341), (3097, 7024), (3512, 6194)]