20718170

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{431}}^1$

素因数の和:491

約数の個数: 64

約数和(自身を含む): 44789760

約数和(自身を除く): 24071590

約数列:

[1, 2, 5, 10, 11, 19, 22, 23, 38, 46, 55, 95, 110, 115, 190, 209, 230, 253, 418, 431, 437, 506, 862, 874, 1045, 1265, 2090, 2155, 2185, 2530, 4310, 4370, 4741, 4807, 8189, 9482, 9614, 9913, 16378, 19826, 23705, 24035, 40945, 47410, 48070, 49565, 81890, 90079, 99130, 109043, 180158, 188347, 218086, 376694, 450395, 545215, 900790, 941735, 1090430, 1883470, 2071817, 4143634, 10359085, 20718170]

約数ペア:

[(1, 20718170), (2, 10359085), (5, 4143634), (10, 2071817), (11, 1883470), (19, 1090430), (22, 941735), (23, 900790), (38, 545215), (46, 450395), (55, 376694), (95, 218086), (110, 188347), (115, 180158), (190, 109043), (209, 99130), (230, 90079), (253, 81890), (418, 49565), (431, 48070), (437, 47410), (506, 40945), (862, 24035), (874, 23705), (1045, 19826), (1265, 16378), (2090, 9913), (2155, 9614), (2185, 9482), (2530, 8189), (4310, 4807), (4370, 4741)]