21604492

素因数分解:

$2^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{139}}^1$

素因数の和:231

約数の個数: 72

約数和(自身を含む): 48486480

約数和(自身を除く): 26881988

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 49, 52, 61, 91, 98, 122, 139, 182, 196, 244, 278, 364, 427, 556, 637, 793, 854, 973, 1274, 1586, 1708, 1807, 1946, 2548, 2989, 3172, 3614, 3892, 5551, 5978, 6811, 7228, 8479, 11102, 11956, 12649, 13622, 16958, 22204, 25298, 27244, 33916, 38857, 50596, 59353, 77714, 88543, 110227, 118706, 155428, 177086, 220454, 237412, 354172, 415471, 440908, 771589, 830942, 1543178, 1661884, 3086356, 5401123, 10802246, 21604492]

約数ペア:

[(1, 21604492), (2, 10802246), (4, 5401123), (7, 3086356), (13, 1661884), (14, 1543178), (26, 830942), (28, 771589), (49, 440908), (52, 415471), (61, 354172), (91, 237412), (98, 220454), (122, 177086), (139, 155428), (182, 118706), (196, 110227), (244, 88543), (278, 77714), (364, 59353), (427, 50596), (556, 38857), (637, 33916), (793, 27244), (854, 25298), (973, 22204), (1274, 16958), (1586, 13622), (1708, 12649), (1807, 11956), (1946, 11102), (2548, 8479), (2989, 7228), (3172, 6811), (3614, 5978), (3892, 5551)]