21311955

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{2333}}^1$

素因数の和:2380

約数の個数: 48

約数和(自身を含む): 43692480

約数和(自身を除く): 22380525

約数列:

[1, 3, 5, 7, 9, 15, 21, 29, 35, 45, 63, 87, 105, 145, 203, 261, 315, 435, 609, 1015, 1305, 1827, 2333, 3045, 6999, 9135, 11665, 16331, 20997, 34995, 48993, 67657, 81655, 104985, 146979, 202971, 244965, 338285, 473599, 608913, 734895, 1014855, 1420797, 2367995, 3044565, 4262391, 7103985, 21311955]

約数ペア:

[(1, 21311955), (3, 7103985), (5, 4262391), (7, 3044565), (9, 2367995), (15, 1420797), (21, 1014855), (29, 734895), (35, 608913), (45, 473599), (63, 338285), (87, 244965), (105, 202971), (145, 146979), (203, 104985), (261, 81655), (315, 67657), (435, 48993), (609, 34995), (1015, 20997), (1305, 16331), (1827, 11665), (2333, 9135), (3045, 6999)]