21730280

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{131}}^1$

素因数の和:195

約数の個数: 128

約数和(自身を含む): 59875200

約数和(自身を除く): 38144920

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 20, 22, 26, 29, 40, 44, 52, 55, 58, 65, 88, 104, 110, 116, 130, 131, 143, 145, 220, 232, 260, 262, 286, 290, 319, 377, 440, 520, 524, 572, 580, 638, 655, 715, 754, 1048, 1144, 1160, 1276, 1310, 1430, 1441, 1508, 1595, 1703, 1885, 2552, 2620, 2860, 2882, 3016, 3190, 3406, 3770, 3799, 4147, 5240, 5720, 5764, 6380, 6812, 7205, 7540, 7598, 8294, 8515, 11528, 12760, 13624, 14410, 15080, 15196, 16588, 17030, 18733, 18995, 20735, 28820, 30392, 33176, 34060, 37466, 37990, 41470, 41789, 49387, 57640, 68120, 74932, 75980, 82940, 83578, 93665, 98774, 149864, 151960, 165880, 167156, 187330, 197548, 208945, 246935, 334312, 374660, 395096, 417890, 493870, 543257, 749320, 835780, 987740, 1086514, 1671560, 1975480, 2173028, 2716285, 4346056, 5432570, 10865140, 21730280]

約数ペア:

[(1, 21730280), (2, 10865140), (4, 5432570), (5, 4346056), (8, 2716285), (10, 2173028), (11, 1975480), (13, 1671560), (20, 1086514), (22, 987740), (26, 835780), (29, 749320), (40, 543257), (44, 493870), (52, 417890), (55, 395096), (58, 374660), (65, 334312), (88, 246935), (104, 208945), (110, 197548), (116, 187330), (130, 167156), (131, 165880), (143, 151960), (145, 149864), (220, 98774), (232, 93665), (260, 83578), (262, 82940), (286, 75980), (290, 74932), (319, 68120), (377, 57640), (440, 49387), (520, 41789), (524, 41470), (572, 37990), (580, 37466), (638, 34060), (655, 33176), (715, 30392), (754, 28820), (1048, 20735), (1144, 18995), (1160, 18733), (1276, 17030), (1310, 16588), (1430, 15196), (1441, 15080), (1508, 14410), (1595, 13624), (1703, 12760), (1885, 11528), (2552, 8515), (2620, 8294), (2860, 7598), (2882, 7540), (3016, 7205), (3190, 6812), (3406, 6380), (3770, 5764), (3799, 5720), (4147, 5240)]