19561388

素因数分解:

$2^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{211}}^1$

素因数の和:283

約数の個数: 72

約数和(自身を含む): 44662464

約数和(自身を除く): 25101076

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 43, 44, 49, 77, 86, 98, 154, 172, 196, 211, 301, 308, 422, 473, 539, 602, 844, 946, 1078, 1204, 1477, 1892, 2107, 2156, 2321, 2954, 3311, 4214, 4642, 5908, 6622, 8428, 9073, 9284, 10339, 13244, 16247, 18146, 20678, 23177, 32494, 36292, 41356, 46354, 63511, 64988, 92708, 99803, 113729, 127022, 199606, 227458, 254044, 399212, 444577, 454916, 698621, 889154, 1397242, 1778308, 2794484, 4890347, 9780694, 19561388]

約数ペア:

[(1, 19561388), (2, 9780694), (4, 4890347), (7, 2794484), (11, 1778308), (14, 1397242), (22, 889154), (28, 698621), (43, 454916), (44, 444577), (49, 399212), (77, 254044), (86, 227458), (98, 199606), (154, 127022), (172, 113729), (196, 99803), (211, 92708), (301, 64988), (308, 63511), (422, 46354), (473, 41356), (539, 36292), (602, 32494), (844, 23177), (946, 20678), (1078, 18146), (1204, 16247), (1477, 13244), (1892, 10339), (2107, 9284), (2156, 9073), (2321, 8428), (2954, 6622), (3311, 5908), (4214, 4642)]