81291028

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^2\times {\mathrm{41}}^1\times {\mathrm{419}}^1$

素因数の和:497

約数の個数: 72

約数和(自身を含む): 180774720

約数和(自身を除く): 99483692

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 41, 52, 82, 91, 164, 169, 182, 287, 338, 364, 419, 533, 574, 676, 838, 1066, 1148, 1183, 1676, 2132, 2366, 2933, 3731, 4732, 5447, 5866, 6929, 7462, 10894, 11732, 13858, 14924, 17179, 21788, 27716, 34358, 38129, 48503, 68716, 70811, 76258, 97006, 120253, 141622, 152516, 194012, 223327, 240506, 283244, 446654, 481012, 495677, 893308, 991354, 1563289, 1982708, 2903251, 3126578, 5806502, 6253156, 11613004, 20322757, 40645514, 81291028]

約数ペア:

[(1, 81291028), (2, 40645514), (4, 20322757), (7, 11613004), (13, 6253156), (14, 5806502), (26, 3126578), (28, 2903251), (41, 1982708), (52, 1563289), (82, 991354), (91, 893308), (164, 495677), (169, 481012), (182, 446654), (287, 283244), (338, 240506), (364, 223327), (419, 194012), (533, 152516), (574, 141622), (676, 120253), (838, 97006), (1066, 76258), (1148, 70811), (1183, 68716), (1676, 48503), (2132, 38129), (2366, 34358), (2933, 27716), (3731, 21788), (4732, 17179), (5447, 14924), (5866, 13858), (6929, 11732), (7462, 10894)]