21072688

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{353}}^1$

素因数の和:422

約数の個数: 80

約数和(自身を含む): 51621696

約数和(自身を除く): 30549008

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 41, 52, 56, 82, 91, 104, 112, 164, 182, 208, 287, 328, 353, 364, 533, 574, 656, 706, 728, 1066, 1148, 1412, 1456, 2132, 2296, 2471, 2824, 3731, 4264, 4589, 4592, 4942, 5648, 7462, 8528, 9178, 9884, 14473, 14924, 18356, 19768, 28946, 29848, 32123, 36712, 39536, 57892, 59696, 64246, 73424, 101311, 115784, 128492, 188149, 202622, 231568, 256984, 376298, 405244, 513968, 752596, 810488, 1317043, 1505192, 1620976, 2634086, 3010384, 5268172, 10536344, 21072688]

約数ペア:

[(1, 21072688), (2, 10536344), (4, 5268172), (7, 3010384), (8, 2634086), (13, 1620976), (14, 1505192), (16, 1317043), (26, 810488), (28, 752596), (41, 513968), (52, 405244), (56, 376298), (82, 256984), (91, 231568), (104, 202622), (112, 188149), (164, 128492), (182, 115784), (208, 101311), (287, 73424), (328, 64246), (353, 59696), (364, 57892), (533, 39536), (574, 36712), (656, 32123), (706, 29848), (728, 28946), (1066, 19768), (1148, 18356), (1412, 14924), (1456, 14473), (2132, 9884), (2296, 9178), (2471, 8528), (2824, 7462), (3731, 5648), (4264, 4942), (4589, 4592)]