21274785

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{479}}^1$

素因数の和:547

約数の個数: 64

約数和(自身を含む): 44236800

約数和(自身を除く): 22962015

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 47, 63, 105, 135, 141, 189, 235, 315, 329, 423, 479, 705, 945, 987, 1269, 1437, 1645, 2115, 2395, 2961, 3353, 4311, 4935, 6345, 7185, 8883, 10059, 12933, 14805, 16765, 21555, 22513, 30177, 44415, 50295, 64665, 67539, 90531, 112565, 150885, 157591, 202617, 337695, 452655, 472773, 607851, 787955, 1013085, 1418319, 2363865, 3039255, 4254957, 7091595, 21274785]

約数ペア:

[(1, 21274785), (3, 7091595), (5, 4254957), (7, 3039255), (9, 2363865), (15, 1418319), (21, 1013085), (27, 787955), (35, 607851), (45, 472773), (47, 452655), (63, 337695), (105, 202617), (135, 157591), (141, 150885), (189, 112565), (235, 90531), (315, 67539), (329, 64665), (423, 50295), (479, 44415), (705, 30177), (945, 22513), (987, 21555), (1269, 16765), (1437, 14805), (1645, 12933), (2115, 10059), (2395, 8883), (2961, 7185), (3353, 6345), (4311, 4935)]