20211657921

素因数分解:

$3^5\times 7^1\times {\mathrm{13}}^2\times {\mathrm{70309}}^1$

素因数の和:70357

約数の個数: 72

約数和(自身を含む): 37467917760

約数和(自身を除く): 17256259839

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 81, 91, 117, 169, 189, 243, 273, 351, 507, 567, 819, 1053, 1183, 1521, 1701, 2457, 3159, 3549, 4563, 7371, 10647, 13689, 22113, 31941, 41067, 70309, 95823, 210927, 287469, 492163, 632781, 914017, 1476489, 1898343, 2742051, 4429467, 5695029, 6398119, 8226153, 11882221, 13288401, 17085087, 19194357, 24678459, 35646663, 39865203, 57583071, 74035377, 83175547, 106939989, 119595609, 172749213, 222106131, 249526641, 320819967, 518247639, 748579923, 962459901, 1554742917, 2245739769, 2887379703, 6737219307, 20211657921]

約数ペア:

[(1, 20211657921), (3, 6737219307), (7, 2887379703), (9, 2245739769), (13, 1554742917), (21, 962459901), (27, 748579923), (39, 518247639), (63, 320819967), (81, 249526641), (91, 222106131), (117, 172749213), (169, 119595609), (189, 106939989), (243, 83175547), (273, 74035377), (351, 57583071), (507, 39865203), (567, 35646663), (819, 24678459), (1053, 19194357), (1183, 17085087), (1521, 13288401), (1701, 11882221), (2457, 8226153), (3159, 6398119), (3549, 5695029), (4563, 4429467), (7371, 2742051), (10647, 1898343), (13689, 1476489), (22113, 914017), (31941, 632781), (41067, 492163), (70309, 287469), (95823, 210927)]