256785360

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{13}}^3\times {\mathrm{487}}^1$

素因数の和:542

約数の個数: 160

約数和(自身を含む): 864111360

約数和(自身を除く): 607326000

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 39, 40, 48, 52, 60, 65, 78, 80, 104, 120, 130, 156, 169, 195, 208, 240, 260, 312, 338, 390, 487, 507, 520, 624, 676, 780, 845, 974, 1014, 1040, 1352, 1461, 1560, 1690, 1948, 2028, 2197, 2435, 2535, 2704, 2922, 3120, 3380, 3896, 4056, 4394, 4870, 5070, 5844, 6331, 6591, 6760, 7305, 7792, 8112, 8788, 9740, 10140, 10985, 11688, 12662, 13182, 13520, 14610, 17576, 18993, 19480, 20280, 21970, 23376, 25324, 26364, 29220, 31655, 32955, 35152, 37986, 38960, 40560, 43940, 50648, 52728, 58440, 63310, 65910, 75972, 82303, 87880, 94965, 101296, 105456, 116880, 126620, 131820, 151944, 164606, 175760, 189930, 246909, 253240, 263640, 303888, 329212, 379860, 411515, 493818, 506480, 527280, 658424, 759720, 823030, 987636, 1069939, 1234545, 1316848, 1519440, 1646060, 1975272, 2139878, 2469090, 3209817, 3292120, 3950544, 4279756, 4938180, 5349695, 6419634, 6584240, 8559512, 9876360, 10699390, 12839268, 16049085, 17119024, 19752720, 21398780, 25678536, 32098170, 42797560, 51357072, 64196340, 85595120, 128392680, 256785360]

約数ペア:

[(1, 256785360), (2, 128392680), (3, 85595120), (4, 64196340), (5, 51357072), (6, 42797560), (8, 32098170), (10, 25678536), (12, 21398780), (13, 19752720), (15, 17119024), (16, 16049085), (20, 12839268), (24, 10699390), (26, 9876360), (30, 8559512), (39, 6584240), (40, 6419634), (48, 5349695), (52, 4938180), (60, 4279756), (65, 3950544), (78, 3292120), (80, 3209817), (104, 2469090), (120, 2139878), (130, 1975272), (156, 1646060), (169, 1519440), (195, 1316848), (208, 1234545), (240, 1069939), (260, 987636), (312, 823030), (338, 759720), (390, 658424), (487, 527280), (507, 506480), (520, 493818), (624, 411515), (676, 379860), (780, 329212), (845, 303888), (974, 263640), (1014, 253240), (1040, 246909), (1352, 189930), (1461, 175760), (1560, 164606), (1690, 151944), (1948, 131820), (2028, 126620), (2197, 116880), (2435, 105456), (2535, 101296), (2704, 94965), (2922, 87880), (3120, 82303), (3380, 75972), (3896, 65910), (4056, 63310), (4394, 58440), (4870, 52728), (5070, 50648), (5844, 43940), (6331, 40560), (6591, 38960), (6760, 37986), (7305, 35152), (7792, 32955), (8112, 31655), (8788, 29220), (9740, 26364), (10140, 25324), (10985, 23376), (11688, 21970), (12662, 20280), (13182, 19480), (13520, 18993), (14610, 17576)]