20917160

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{347}}^1$

素因数の和:506

約数の個数: 64

約数和(自身を含む): 51865920

約数和(自身を除く): 30948760

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 137, 220, 274, 347, 440, 548, 685, 694, 1096, 1370, 1388, 1507, 1735, 2740, 2776, 3014, 3470, 3817, 5480, 6028, 6940, 7535, 7634, 12056, 13880, 15070, 15268, 19085, 30140, 30536, 38170, 47539, 60280, 76340, 95078, 152680, 190156, 237695, 380312, 475390, 522929, 950780, 1045858, 1901560, 2091716, 2614645, 4183432, 5229290, 10458580, 20917160]

約数ペア:

[(1, 20917160), (2, 10458580), (4, 5229290), (5, 4183432), (8, 2614645), (10, 2091716), (11, 1901560), (20, 1045858), (22, 950780), (40, 522929), (44, 475390), (55, 380312), (88, 237695), (110, 190156), (137, 152680), (220, 95078), (274, 76340), (347, 60280), (440, 47539), (548, 38170), (685, 30536), (694, 30140), (1096, 19085), (1370, 15268), (1388, 15070), (1507, 13880), (1735, 12056), (2740, 7634), (2776, 7535), (3014, 6940), (3470, 6028), (3817, 5480)]