81977220

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{661}}^1$

素因数の和:742

約数の個数: 144

約数和(自身を含む): 273257712

約数和(自身を除く): 191280492

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 30, 36, 39, 45, 52, 53, 60, 65, 78, 90, 106, 117, 130, 156, 159, 180, 195, 212, 234, 260, 265, 318, 390, 468, 477, 530, 585, 636, 661, 689, 780, 795, 954, 1060, 1170, 1322, 1378, 1590, 1908, 1983, 2067, 2340, 2385, 2644, 2756, 3180, 3305, 3445, 3966, 4134, 4770, 5949, 6201, 6610, 6890, 7932, 8268, 8593, 9540, 9915, 10335, 11898, 12402, 13220, 13780, 17186, 19830, 20670, 23796, 24804, 25779, 29745, 31005, 34372, 35033, 39660, 41340, 42965, 51558, 59490, 62010, 70066, 77337, 85930, 103116, 105099, 118980, 124020, 128895, 140132, 154674, 171860, 175165, 210198, 257790, 309348, 315297, 350330, 386685, 420396, 455429, 515580, 525495, 630594, 700660, 773370, 910858, 1050990, 1261188, 1366287, 1546740, 1576485, 1821716, 2101980, 2277145, 2732574, 3152970, 4098861, 4554290, 5465148, 6305940, 6831435, 8197722, 9108580, 13662870, 16395444, 20494305, 27325740, 40988610, 81977220]

約数ペア:

[(1, 81977220), (2, 40988610), (3, 27325740), (4, 20494305), (5, 16395444), (6, 13662870), (9, 9108580), (10, 8197722), (12, 6831435), (13, 6305940), (15, 5465148), (18, 4554290), (20, 4098861), (26, 3152970), (30, 2732574), (36, 2277145), (39, 2101980), (45, 1821716), (52, 1576485), (53, 1546740), (60, 1366287), (65, 1261188), (78, 1050990), (90, 910858), (106, 773370), (117, 700660), (130, 630594), (156, 525495), (159, 515580), (180, 455429), (195, 420396), (212, 386685), (234, 350330), (260, 315297), (265, 309348), (318, 257790), (390, 210198), (468, 175165), (477, 171860), (530, 154674), (585, 140132), (636, 128895), (661, 124020), (689, 118980), (780, 105099), (795, 103116), (954, 85930), (1060, 77337), (1170, 70066), (1322, 62010), (1378, 59490), (1590, 51558), (1908, 42965), (1983, 41340), (2067, 39660), (2340, 35033), (2385, 34372), (2644, 31005), (2756, 29745), (3180, 25779), (3305, 24804), (3445, 23796), (3966, 20670), (4134, 19830), (4770, 17186), (5949, 13780), (6201, 13220), (6610, 12402), (6890, 11898), (7932, 10335), (8268, 9915), (8593, 9540)]