668867890

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{211}}^1\times {\mathrm{643}}^1$

素因数の和:907

約数の個数: 64

約数和(自身を含む): 1327052160

約数和(自身を除く): 658184270

約数列:

[1, 2, 5, 10, 17, 29, 34, 58, 85, 145, 170, 211, 290, 422, 493, 643, 986, 1055, 1286, 2110, 2465, 3215, 3587, 4930, 6119, 6430, 7174, 10931, 12238, 17935, 18647, 21862, 30595, 35870, 37294, 54655, 61190, 93235, 104023, 109310, 135673, 186470, 208046, 271346, 316999, 520115, 633998, 678365, 1040230, 1356730, 1584995, 2306441, 3169990, 3934517, 4612882, 7869034, 11532205, 19672585, 23064410, 39345170, 66886789, 133773578, 334433945, 668867890]

約数ペア:

[(1, 668867890), (2, 334433945), (5, 133773578), (10, 66886789), (17, 39345170), (29, 23064410), (34, 19672585), (58, 11532205), (85, 7869034), (145, 4612882), (170, 3934517), (211, 3169990), (290, 2306441), (422, 1584995), (493, 1356730), (643, 1040230), (986, 678365), (1055, 633998), (1286, 520115), (2110, 316999), (2465, 271346), (3215, 208046), (3587, 186470), (4930, 135673), (6119, 109310), (6430, 104023), (7174, 93235), (10931, 61190), (12238, 54655), (17935, 37294), (18647, 35870), (21862, 30595)]