21574329

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{389}}^1$

素因数の和:557

約数の個数: 32

約数和(自身を含む): 34944000

約数和(自身を除く): 13369671

約数列:

[1, 3, 7, 19, 21, 57, 133, 139, 389, 399, 417, 973, 1167, 2641, 2723, 2919, 7391, 7923, 8169, 18487, 22173, 51737, 54071, 55461, 155211, 162213, 378497, 1027349, 1135491, 3082047, 7191443, 21574329]

約数ペア:

[(1, 21574329), (3, 7191443), (7, 3082047), (19, 1135491), (21, 1027349), (57, 378497), (133, 162213), (139, 155211), (389, 55461), (399, 54071), (417, 51737), (973, 22173), (1167, 18487), (2641, 8169), (2723, 7923), (2919, 7391)]