21993356

素因数分解:

$2^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{101}}^2$

素因数の和:231

約数の個数: 54

約数和(自身を含む): 49330764

約数和(自身を除く): 27337408

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 49, 77, 98, 101, 154, 196, 202, 308, 404, 539, 707, 1078, 1111, 1414, 2156, 2222, 2828, 4444, 4949, 7777, 9898, 10201, 15554, 19796, 20402, 31108, 40804, 54439, 71407, 108878, 112211, 142814, 217756, 224422, 285628, 448844, 499849, 785477, 999698, 1570954, 1999396, 3141908, 5498339, 10996678, 21993356]

約数ペア:

[(1, 21993356), (2, 10996678), (4, 5498339), (7, 3141908), (11, 1999396), (14, 1570954), (22, 999698), (28, 785477), (44, 499849), (49, 448844), (77, 285628), (98, 224422), (101, 217756), (154, 142814), (196, 112211), (202, 108878), (308, 71407), (404, 54439), (539, 40804), (707, 31108), (1078, 20402), (1111, 19796), (1414, 15554), (2156, 10201), (2222, 9898), (2828, 7777), (4444, 4949)]