19997490812

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{89}}^1\times {\mathrm{379}}^1\times {\mathrm{877}}^1$

素因数の和:1375

約数の個数: 72

約数和(自身を含む): 38465355600

約数和(自身を除く): 18467864788

約数列:

[1, 2, 4, 13, 26, 52, 89, 169, 178, 338, 356, 379, 676, 758, 877, 1157, 1516, 1754, 2314, 3508, 4628, 4927, 9854, 11401, 15041, 19708, 22802, 30082, 33731, 45604, 60164, 64051, 67462, 78053, 128102, 134924, 148213, 156106, 256204, 296426, 312212, 332383, 438503, 592852, 664766, 877006, 1014689, 1329532, 1754012, 2029378, 4058756, 4320979, 5700539, 8641958, 11401078, 13190957, 17283916, 22802156, 26381914, 29582087, 52763828, 56172727, 59164174, 112345454, 118328348, 224690908, 384567131, 769134262, 1538268524, 4999372703, 9998745406, 19997490812]

約数ペア:

[(1, 19997490812), (2, 9998745406), (4, 4999372703), (13, 1538268524), (26, 769134262), (52, 384567131), (89, 224690908), (169, 118328348), (178, 112345454), (338, 59164174), (356, 56172727), (379, 52763828), (676, 29582087), (758, 26381914), (877, 22802156), (1157, 17283916), (1516, 13190957), (1754, 11401078), (2314, 8641958), (3508, 5700539), (4628, 4320979), (4927, 4058756), (9854, 2029378), (11401, 1754012), (15041, 1329532), (19708, 1014689), (22802, 877006), (30082, 664766), (33731, 592852), (45604, 438503), (60164, 332383), (64051, 312212), (67462, 296426), (78053, 256204), (128102, 156106), (134924, 148213)]