21187508

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^2\times {\mathrm{31}}^1$

素因数の和:117

約数の個数: 72

約数和(自身を含む): 44593920

約数和(自身を除く): 23406412

約数列:

[1, 2, 4, 17, 19, 23, 31, 34, 38, 46, 62, 68, 76, 92, 124, 323, 391, 437, 527, 529, 589, 646, 713, 782, 874, 1054, 1058, 1178, 1292, 1426, 1564, 1748, 2108, 2116, 2356, 2852, 7429, 8993, 10013, 10051, 12121, 13547, 14858, 16399, 17986, 20026, 20102, 24242, 27094, 29716, 32798, 35972, 40052, 40204, 48484, 54188, 65596, 170867, 230299, 278783, 311581, 341734, 460598, 557566, 623162, 683468, 921196, 1115132, 1246324, 5296877, 10593754, 21187508]

約数ペア:

[(1, 21187508), (2, 10593754), (4, 5296877), (17, 1246324), (19, 1115132), (23, 921196), (31, 683468), (34, 623162), (38, 557566), (46, 460598), (62, 341734), (68, 311581), (76, 278783), (92, 230299), (124, 170867), (323, 65596), (391, 54188), (437, 48484), (527, 40204), (529, 40052), (589, 35972), (646, 32798), (713, 29716), (782, 27094), (874, 24242), (1054, 20102), (1058, 20026), (1178, 17986), (1292, 16399), (1426, 14858), (1564, 13547), (1748, 12121), (2108, 10051), (2116, 10013), (2356, 8993), (2852, 7429)]