21981176

素因数分解:

$2^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{283}}^1$

素因数の和:388

約数の個数: 64

約数和(自身を含む): 50438400

約数和(自身を除く): 28457224

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 38, 56, 73, 76, 133, 146, 152, 266, 283, 292, 511, 532, 566, 584, 1022, 1064, 1132, 1387, 1981, 2044, 2264, 2774, 3962, 4088, 5377, 5548, 7924, 9709, 10754, 11096, 15848, 19418, 20659, 21508, 37639, 38836, 41318, 43016, 75278, 77672, 82636, 144613, 150556, 165272, 289226, 301112, 392521, 578452, 785042, 1156904, 1570084, 2747647, 3140168, 5495294, 10990588, 21981176]

約数ペア:

[(1, 21981176), (2, 10990588), (4, 5495294), (7, 3140168), (8, 2747647), (14, 1570084), (19, 1156904), (28, 785042), (38, 578452), (56, 392521), (73, 301112), (76, 289226), (133, 165272), (146, 150556), (152, 144613), (266, 82636), (283, 77672), (292, 75278), (511, 43016), (532, 41318), (566, 38836), (584, 37639), (1022, 21508), (1064, 20659), (1132, 19418), (1387, 15848), (1981, 11096), (2044, 10754), (2264, 9709), (2774, 7924), (3962, 5548), (4088, 5377)]