81943960

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{211}}^1$

素因数の和:321

約数の個数: 128

約数和(自身を含む): 225907200

約数和(自身を除く): 143963240

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 19, 20, 28, 35, 38, 40, 56, 70, 73, 76, 95, 133, 140, 146, 152, 190, 211, 266, 280, 292, 365, 380, 422, 511, 532, 584, 665, 730, 760, 844, 1022, 1055, 1064, 1330, 1387, 1460, 1477, 1688, 2044, 2110, 2555, 2660, 2774, 2920, 2954, 4009, 4088, 4220, 5110, 5320, 5548, 5908, 6935, 7385, 8018, 8440, 9709, 10220, 11096, 11816, 13870, 14770, 15403, 16036, 19418, 20045, 20440, 27740, 28063, 29540, 30806, 32072, 38836, 40090, 48545, 55480, 56126, 59080, 61612, 77015, 77672, 80180, 97090, 107821, 112252, 123224, 140315, 154030, 160360, 194180, 215642, 224504, 280630, 292657, 308060, 388360, 431284, 539105, 561260, 585314, 616120, 862568, 1078210, 1122520, 1170628, 1463285, 2048599, 2156420, 2341256, 2926570, 4097198, 4312840, 5853140, 8194396, 10242995, 11706280, 16388792, 20485990, 40971980, 81943960]

約数ペア:

[(1, 81943960), (2, 40971980), (4, 20485990), (5, 16388792), (7, 11706280), (8, 10242995), (10, 8194396), (14, 5853140), (19, 4312840), (20, 4097198), (28, 2926570), (35, 2341256), (38, 2156420), (40, 2048599), (56, 1463285), (70, 1170628), (73, 1122520), (76, 1078210), (95, 862568), (133, 616120), (140, 585314), (146, 561260), (152, 539105), (190, 431284), (211, 388360), (266, 308060), (280, 292657), (292, 280630), (365, 224504), (380, 215642), (422, 194180), (511, 160360), (532, 154030), (584, 140315), (665, 123224), (730, 112252), (760, 107821), (844, 97090), (1022, 80180), (1055, 77672), (1064, 77015), (1330, 61612), (1387, 59080), (1460, 56126), (1477, 55480), (1688, 48545), (2044, 40090), (2110, 38836), (2555, 32072), (2660, 30806), (2774, 29540), (2920, 28063), (2954, 27740), (4009, 20440), (4088, 20045), (4220, 19418), (5110, 16036), (5320, 15403), (5548, 14770), (5908, 13870), (6935, 11816), (7385, 11096), (8018, 10220), (8440, 9709)]