261988688

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{991}}^1$

素因数の和:1084

約数の個数: 80

約数和(自身を含む): 578629632

約数和(自身を除く): 316640944

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 41, 52, 62, 82, 104, 124, 164, 208, 248, 328, 403, 496, 533, 656, 806, 991, 1066, 1271, 1612, 1982, 2132, 2542, 3224, 3964, 4264, 5084, 6448, 7928, 8528, 10168, 12883, 15856, 16523, 20336, 25766, 30721, 33046, 40631, 51532, 61442, 66092, 81262, 103064, 122884, 132184, 162524, 206128, 245768, 264368, 325048, 399373, 491536, 528203, 650096, 798746, 1056406, 1259561, 1597492, 2112812, 2519122, 3194984, 4225624, 5038244, 6389968, 8451248, 10076488, 16374293, 20152976, 32748586, 65497172, 130994344, 261988688]

約数ペア:

[(1, 261988688), (2, 130994344), (4, 65497172), (8, 32748586), (13, 20152976), (16, 16374293), (26, 10076488), (31, 8451248), (41, 6389968), (52, 5038244), (62, 4225624), (82, 3194984), (104, 2519122), (124, 2112812), (164, 1597492), (208, 1259561), (248, 1056406), (328, 798746), (403, 650096), (496, 528203), (533, 491536), (656, 399373), (806, 325048), (991, 264368), (1066, 245768), (1271, 206128), (1612, 162524), (1982, 132184), (2132, 122884), (2542, 103064), (3224, 81262), (3964, 66092), (4264, 61442), (5084, 51532), (6448, 40631), (7928, 33046), (8528, 30721), (10168, 25766), (12883, 20336), (15856, 16523)]