20001604

素因数分解:

$2^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{131}}^1$

素因数の和:209

約数の個数: 72

約数和(自身を含む): 44241120

約数和(自身を除く): 24239516

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 41, 49, 76, 82, 98, 131, 133, 164, 196, 262, 266, 287, 524, 532, 574, 779, 917, 931, 1148, 1558, 1834, 1862, 2009, 2489, 3116, 3668, 3724, 4018, 4978, 5371, 5453, 6419, 8036, 9956, 10742, 10906, 12838, 17423, 21484, 21812, 25676, 34846, 37597, 38171, 69692, 75194, 76342, 102049, 121961, 150388, 152684, 204098, 243922, 263179, 408196, 487844, 526358, 714343, 1052716, 1428686, 2857372, 5000401, 10000802, 20001604]

約数ペア:

[(1, 20001604), (2, 10000802), (4, 5000401), (7, 2857372), (14, 1428686), (19, 1052716), (28, 714343), (38, 526358), (41, 487844), (49, 408196), (76, 263179), (82, 243922), (98, 204098), (131, 152684), (133, 150388), (164, 121961), (196, 102049), (262, 76342), (266, 75194), (287, 69692), (524, 38171), (532, 37597), (574, 34846), (779, 25676), (917, 21812), (931, 21484), (1148, 17423), (1558, 12838), (1834, 10906), (1862, 10742), (2009, 9956), (2489, 8036), (3116, 6419), (3668, 5453), (3724, 5371), (4018, 4978)]