21885796

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{181}}^1$

素因数の和:284

約数の個数: 48

約数和(自身を含む): 42602560

約数和(自身を除く): 20716764

約数列:

[1, 2, 4, 19, 37, 38, 43, 74, 76, 86, 148, 172, 181, 362, 703, 724, 817, 1406, 1591, 1634, 2812, 3182, 3268, 3439, 6364, 6697, 6878, 7783, 13394, 13756, 15566, 26788, 30229, 31132, 60458, 120916, 127243, 147877, 254486, 287971, 295754, 508972, 575942, 591508, 1151884, 5471449, 10942898, 21885796]

約数ペア:

[(1, 21885796), (2, 10942898), (4, 5471449), (19, 1151884), (37, 591508), (38, 575942), (43, 508972), (74, 295754), (76, 287971), (86, 254486), (148, 147877), (172, 127243), (181, 120916), (362, 60458), (703, 31132), (724, 30229), (817, 26788), (1406, 15566), (1591, 13756), (1634, 13394), (2812, 7783), (3182, 6878), (3268, 6697), (3439, 6364)]