19943440

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{131}}^1\times {\mathrm{173}}^1$

素因数の和:328

約数の個数: 80

約数和(自身を含む): 51264576

約数和(自身を除く): 31321136

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 131, 173, 176, 220, 262, 346, 440, 524, 655, 692, 865, 880, 1048, 1310, 1384, 1441, 1730, 1903, 2096, 2620, 2768, 2882, 3460, 3806, 5240, 5764, 6920, 7205, 7612, 9515, 10480, 11528, 13840, 14410, 15224, 19030, 22663, 23056, 28820, 30448, 38060, 45326, 57640, 76120, 90652, 113315, 115280, 152240, 181304, 226630, 249293, 362608, 453260, 498586, 906520, 997172, 1246465, 1813040, 1994344, 2492930, 3988688, 4985860, 9971720, 19943440]

約数ペア:

[(1, 19943440), (2, 9971720), (4, 4985860), (5, 3988688), (8, 2492930), (10, 1994344), (11, 1813040), (16, 1246465), (20, 997172), (22, 906520), (40, 498586), (44, 453260), (55, 362608), (80, 249293), (88, 226630), (110, 181304), (131, 152240), (173, 115280), (176, 113315), (220, 90652), (262, 76120), (346, 57640), (440, 45326), (524, 38060), (655, 30448), (692, 28820), (865, 23056), (880, 22663), (1048, 19030), (1310, 15224), (1384, 14410), (1441, 13840), (1730, 11528), (1903, 10480), (2096, 9515), (2620, 7612), (2768, 7205), (2882, 6920), (3460, 5764), (3806, 5240)]