18646784

素因数分解:

$2^8\times {\mathrm{13}}^2\times {\mathrm{431}}^1$

素因数の和:473

約数の個数: 54

約数和(自身を含む): 40397616

約数和(自身を除く): 21750832

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 64, 104, 128, 169, 208, 256, 338, 416, 431, 676, 832, 862, 1352, 1664, 1724, 2704, 3328, 3448, 5408, 5603, 6896, 10816, 11206, 13792, 21632, 22412, 27584, 43264, 44824, 55168, 72839, 89648, 110336, 145678, 179296, 291356, 358592, 582712, 717184, 1165424, 1434368, 2330848, 4661696, 9323392, 18646784]

約数ペア:

[(1, 18646784), (2, 9323392), (4, 4661696), (8, 2330848), (13, 1434368), (16, 1165424), (26, 717184), (32, 582712), (52, 358592), (64, 291356), (104, 179296), (128, 145678), (169, 110336), (208, 89648), (256, 72839), (338, 55168), (416, 44824), (431, 43264), (676, 27584), (832, 22412), (862, 21632), (1352, 13792), (1664, 11206), (1724, 10816), (2704, 6896), (3328, 5603), (3448, 5408)]